12,700 Pounds Single Rear Wheel, 14,000 Dually: What the 2027 Sierra 3500 HD GVWR Tells You (and What It Does Not)

The question I get every fall from hay crews, hotshot haulers, and contractors is some version of this: can I buy the one-ton without the pickup box, so my body builder can set a flatbed, a bale bed, or a service body on it. For 2027 the answer is a clear yes, and GM publishes the chassis cab as its own lineup rather than as an option on the pickup. It is Pro or SLE, Regular Cab or Crew Cab, 2WD or 4WD, with a 14,000-pound GVWR on every model, a wide-track rear axle, and an open C-channel rear frame section made for mounting a body. This post covers what is verified for 2027 and stops where the published information stops. Cab-to-axle lengths, upfit payload, and trailer ratings for a chassis cab are not something GM prints in the ordering material; those come from your body builder and from GM's upfitter resources, and I will point you there rather than guess. If you want the fully rated pickup instead, the 2026 Sierra 3500 HD packages section covers the trucks in our yard, and the what-is-new-for-2027 post walks the rest of the model year. 2. TOP CTA View Sierra 3500 HD Inventory Get Pre-Qualified 3. ON THIS PAGE On This Page What a chassis cab is, and what you get What you can order for 2027, trim by trim Engines, power take-off, fuel, and wheels What your body builder needs, and what GM does not publish Chassis cab or a pickup with the box removed How to order a 2027 chassis cab with your body builder 4. CONTENT SECTIONS What Is a Chassis Cab, and What Do You Actually Get? You get a complete truck from the back of the cab forward, and bare frame rails behind it. No pickup box, no rear bumper, no tailgate. The rear frame section is an open C-channel rather than the boxed rear of a pickup, which is what a body builder wants: it takes brackets, U-bolts, and outriggers the way a flatbed, bale bed, dump body, or service body is designed to mount. The front of the frame is the same fully boxed, hydroformed section the pickup uses. The other structural piece that matters is the rear axle. Every 2027 chassis cab comes with a wide-track rear axle as standard, which sets the dual rear wheels further apart than a pickup dually and gives a wide body a more stable footprint. That is standard equipment, not an option you have to remember to add. And there is one rating GM does publish: 14,000 pounds of GVWR on every 2027 chassis cab model, and no other GVWR is listed. That is the same ceiling as a dual-rear-wheel Sierra 3500 HD pickup, and it is the number your body builder works from when they size a body and figure out what is left over for the load. What GVWR does and does not mean is worth reading on its own, and the 2027 GVWR post takes it apart in detail. What GM does not publish for the chassis cab Cab-to-axle lengths, wheelbases, frame lengths, payload, towing ratings, and GCWR are not in the published 2027 chassis cab information. Those figures come from your body builder and from GM's upfitter resources, which is where they have always belonged, because the finished truck is only partly GM's. Anyone quoting you a chassis-cab payload before the body is chosen is making it up. What Can You Order for 2027, Trim by Trim? Two trims, two cabs, and both drivetrains. The Pro is the work-truck trim and is available on every chassis cab model; the SLE is offered on 4WD models. You can have a Regular Cab or a Crew Cab, and either one in 2WD or 4WD. There is no SLT, AT4, Denali, or Denali Ultimate chassis cab, which surprises nobody who has priced a service body. Item 2027 Sierra 3500 HD chassis cab Trims Pro on all models; SLE on 4WD models Cabs and drive Regular Cab or Crew Cab, 2WD or 4WD GVWR 14,000 lb on every model; no other GVWR listed Rear axle Wide-track, standard; 3.73 with gas, 3.42 with the Duramax Frame Fully boxed hydroformed front section, open C-channel rear section for body mounting Engines Gas V8 with direct injection and variable valve timing, standard; Duramax turbo-diesel V8, B20-compatible, available Transmissions Allison 10-speed automatic; Allison 10-speed with power take-off on 4WD diesels Fuel 40-gallon rear tank standard; 63.5 gallons front and rear with the Duramax Wheels and tires 18-inch silver painted steel on the Pro, 18-inch polished forged on the SLE, LT235/80R18 all-terrain, matching spare Cab-to-axle, payload, towing Not published; from the body builder and GM's upfitter resources One detail to hand straight to your upfitter: GM lists two Regular Cab model numbers for each drivetrain, and the published material does not spell out how they differ. Your body builder will know which one their body is cataloged against, so ask them before the order goes in rather than after. A specialty option, the Ambulance, Fire, and Rescue Package, is tied to one of those Regular Cab models and is a fleet or government order, which is the right lane for a rural department shopping a brush or rescue body. Cab and safety equipment follows the pickup. Adaptive cruise control is standard for 2027, as is the Sierra HD Pro Safety group with forward collision alert, lane departure warning, following distance indicator, front pedestrian and bicyclist braking, and low speed forward automatic braking. The Pro runs a 7-inch screen and the SLE a 13.4-inch screen with Google built-in and a 12.3-inch driver display. The integrated trailer brake controller is standard, and both transfer cases carry over: push-button two-speed on the Pro, Autotrac available for fleet orders. Colors are the same seven offered on a Pro or SLE pickup. Which Engine, and Do You Need Power Take-Off? The gas V8 with direct injection and variable valve timing is standard, and the Duramax turbo-diesel V8, B20-compatible, is available. Both pair with an Allison 10-speed automatic. A third transmission, the Allison 10-speed with integrated power take-off, is available with the Duramax on 4WD models, and that is the one that matters if your body has hydraulics. Power take-off drives a pump off the transmission, so a dump body, a hydraulic bale bed, a crane, or a hoist runs off the truck rather than off a separate engine bolted to the frame. If your body builder's quote includes a pump and a reservoir, ask them whether they are specifying power take-off or a belt or electric system, because that answer changes your engine and drivetrain choice before anything else on the order. Fuel is the other spec that separates a working chassis cab from a pickup. A 40-gallon tank behind the rear axle is standard, and with the Duramax you can order front and rear tanks totaling 63.5 gallons. For an outfit running a service body between Mobridge, Selby, and Pierre in a week, or a hay crew that does not want to stop in the middle of a windrow, that second tank earns its keep. Electrical capacity backs it up: dual alternators are available, and so is a universal vehicle module, an upfitter switch kit with three 30-amp and two 20-amp circuits, and a high idle switch for running equipment while parked. A winter note on Snow Plow Prep The Snow Plow Prep Package is available on the chassis cab, requires 4WD, and cannot be combined with the heavy-duty front spring package. If you hold a November-to-March snow contract and also want a hydraulic body, get those two lines in front of your body builder and your salesperson at the same time so they do not fight each other on the order. 5. IMAGE BREAK A hotshot deck, a bale bed, or a service body starts with the same decision: where the body mounts, what the body weighs, and what is left for the load. What Does Your Body Builder Need From You? Three things, in this order: the cab and drivetrain you want, the body you want on it, and the cab-to-axle length that body requires. The third one is the piece that comes from them and from GM's upfitter resources, not from a sales brochure, and it is the reason the order has to be a three-way conversation instead of a two-way one. The same goes for what the finished truck can carry and pull. Once a flatbed, a bale bed, or a service body with compartments full of tools is bolted on, the weight of that body comes out of what is available under the 14,000-pound ceiling. Your body builder calculates the finished weight and the load capacity of the completed vehicle, and the final labels on that truck reflect the truck as it is delivered to you. Read the trailering information label in the driver door jamb and the loading placard when it arrives, and scale the finished truck loaded the way you actually run it. For scale, and clearly labeled as a different truck: the 2026 Sierra 3500 HD pickup is rated by GM at up to 20,000 pounds conventional, properly equipped, and a 2026 4WD Crew Cab long bed dually with the Duramax is rated at 31,000 pounds on a gooseneck. Those are 2026 pickup ratings on pickup configurations, they do not transfer to a chassis cab, and GM has not published 2027 ratings for either truck line yet. If you want that arithmetic worked all the way through on a real load, the hotshot and harvest post does it step by step. Chassis Cab, or a Pickup With the Box Taken Off? Both roads exist, and I have sold trucks down each of them. The pickup line offers a bed delete on a Pro or SLE long bed, so you can order a pickup without the box and have a flatbed set on it. The chassis cab is purpose-built for the job: open C-channel rear frame, wide-track rear axle, the bigger fuel tanks, and a frame your body builder already has in their catalog. Where the pickup route makes sense is when you want a truck that can go back to being a pickup, or when you want a trim the chassis cab does not offer. Where it costs you is in fit and in time: a body cataloged for a chassis cab frame is a bolt-up, and the same body on a boxed pickup frame is a fabrication job with brackets somebody has to make. Be honest about the day-to-day, too. Either way you end up with a wide, long, dual-rear-wheel truck. It will not fit every shop door or every automatic car wash, it rides harder empty than a single-rear-wheel truck, and a Crew Cab with a long body is a lot of vehicle in a downtown parking spot. That is the cost of a truck that hauls at capacity every week, and for the outfits buying these, it is a cost worth paying. The cab and configuration section of the 2027 buyers guide covers the choices side by side. HOW-TO How to Order a 2027 Chassis Cab With Your Body Builder Work it in this order and the truck and the body arrive matched instead of nearly matched. Pick the body first: flatbed, bale bed, dump, or service body, with its real weight and its mounting requirements. Everything downstream is set by that choice. Get the cab-to-axle length from your body builder: they will tell you which chassis cab model their body is cataloged against, including which of the two Regular Cab model numbers to use. Decide on hydraulics before the engine: if the body needs power take-off, you are ordering the Duramax on a 4WD model with the power take-off transmission, and that decision cannot be added later. Spec the electrical and fuel to the work: dual alternators, the upfitter switch kit, the universal vehicle module, high idle, and the 63.5-gallon tank option with the diesel for long days between towns. Add the seasonal equipment now: Snow Plow Prep needs 4WD and does not combine with the heavy-duty front spring package, so settle that conflict while the order is still open. Scale and label the finished truck: when the body is mounted, weigh it, read the loading placard and the trailering information label in the driver door jamb, and keep a copy of the completed-vehicle paperwork from the upfitter in the glove box. QUICK OVERVIEW TABLE Is the Chassis Cab the Right Truck for Your Outfit? Worth it if Skip it (buy the pickup) if A flatbed, bale bed, dump body, or service body is going on the truck and staying on Your body needs power take-off hydraulics You want the wide-track rear axle and the bigger fuel tanks Your body builder already catalogs a bolt-up body for this frame You want a pickup box, a tailgate, and a truck that can go back to hauling calves and kids You want a trim above the SLE, or leather and the bigger creature comforts You need a rated, published trailer figure on paper before you sign You need a truck in the yard this fall rather than a build and an upfit KEY TAKEAWAYS Key Takeaways The 2027 Sierra 3500 HD chassis cab is its own lineup: Pro or SLE, Regular or Crew Cab, 2WD or 4WD, with SLE on 4WD models. Every model carries a 14,000-pound GVWR, a wide-track rear axle, and an open C-channel rear frame section built for mounting a body. Both engines are offered with an Allison 10-speed, and power take-off is available with the Duramax on 4WD models for hydraulic bodies. Fuel runs 40 gallons standard or 63.5 gallons in front and rear tanks with the Duramax; 18-inch wheels and LT235/80R18 tires are standard. Cab-to-axle, payload, and towing figures for a chassis cab come from the body builder and GM's upfitter resources, and the finished truck's labels are the final word. FAQ Frequently Asked Questions Can you order a 2027 GMC Sierra 3500 HD as a chassis cab for a flatbed or bale bed? Yes. GM publishes the 2027 chassis cab as a separate lineup in Pro and SLE trim, Regular Cab or Crew Cab, 2WD or 4WD, with the SLE offered on 4WD models. It comes with an open C-channel rear frame section and a wide-track rear axle so a body builder can mount a flatbed, bale bed, dump body, or service body. What is the cab-to-axle length of a 2027 Sierra 3500 HD chassis cab? GM does not print cab-to-axle lengths, wheelbases, or frame lengths in the published 2027 chassis cab information, so we will not quote one. Your body builder works from GM's upfitter resources and will tell you exactly which model number their body is cataloged against. Bring us that answer and we will order to it. Does the chassis cab offer power take-off for a hydraulic bed? Yes, with the Duramax turbo-diesel V8 on a 4WD model, through an Allison 10-speed automatic with integrated power take-off. Dual alternators, a universal vehicle module, an upfitter switch kit, and a high idle switch are also available for equipment that runs while the truck is parked. How much can a 2027 chassis cab carry once the body is on it? The GVWR is 14,000 pounds on every model, and the weight of the body comes out of that ceiling before your load does. The exact capacity of a completed truck is calculated by the upfitter, and the loading placard and the trailering information label in the driver door jamb of the delivered truck are the figures to work from. Scale the finished truck loaded the way you run it. MY TAKE My Take on the 2027 Chassis Cab For the outfits around here that feed with a bale bed, run a service body, or haul a hotshot deck, this is the honest truck for the job, and it is nice to finally have the 2027 information in hand to talk about it. The wide-track axle, the open frame rails, the option of 63.5 gallons of fuel, and power take-off on a 4WD diesel are the things that make a working body work, and none of them are afterthoughts on this truck. The part I will keep repeating is that a chassis cab is a three-way order. You, us, and the body builder all have to be in the same conversation, because the numbers that decide the truck, cab-to-axle length and finished capacity, live with them and not with a brochure. Get them on the phone before the order goes in and the truck shows up right the first time. The full 2027 detail is in the 2027 GMC Sierra 3500 HD buyers guide, and the rated pickups are in the 2026 buyers guide and on our lot as this is written. Come see us at Beadle Chevrolet GMC, 2200 US Hwy 12 in Mobridge, or call or text 605-845-7277, and bring your body builder's spec sheet with you. BOTTOM CTA View Sierra 3500 HD Inventory Get Pre-Qualified Contact Beadle Chevrolet GMC ABOUT THE AUTHOR (LOCKED) About the Author Lexy Tabbert — Beadle Chevrolet, Mobridge, SD Lexy Tabbert is the Director of Sales and Marketing at Beadle Chevrolet in Mobridge, South Dakota. She covers Chevrolet and GMC vehicles, trim comparisons, and buyer guidance — helping families, ranchers, and ag operators across the region find the right truck and configuration for their needs. Learn more about Lexy.

GM published the 2027 GMC Sierra 3500 HD ordering information on September 18, and the change most likely to show up first at your tire shop has nothing to do with horsepower. The 17-inch dually wheel is gone. So is the LT235/80R17E tire that went with it, the painted center caps, the chrome wheel skins, and the 17-inch spare. Every 2027 Sierra 3500 HD dually now leaves the factory on 18-inch wheels wearing LT235/80R18 tires: silver painted steel on the Pro, polished forged aluminum on the SLE, SLT, Denali, and Denali Ultimate. That is a real change for anyone who keeps a spare on the hay trailer or buys six tires at a time, and it is worth understanding before you spec an order. What it is not is a capability change you can put a number on: GM has not published 2027 towing, payload, or GCWR figures yet. If you want the fully rated truck, the 2026 Sierra 3500 HD buyers guide covers the trucks on our lot, and the what-is-new-for-2027 post walks the rest of the changes. 2. TOP CTA View Sierra 3500 HD Inventory Get Pre-Qualified 3. ON THIS PAGE On This Page What changed on the 2027 dually wheel and tire Which 18-inch wheel comes on which 2027 dually Why one tire size across six wheels matters out here Did anything change on the single-rear-wheel side Does an 18-inch wheel change what the truck can pull How to spec wheels and tires on a 2027 dually order 4. CONTENT SECTIONS What Changed on the 2027 Dually Wheel and Tire? The 17-inch dual-rear-wheel package was deleted in its entirety. The 17-inch painted steel wheel, the painted center caps, the chrome wheel skins, the LT235/80R17E tire, and the 17-inch spare are all absent from the 2027 listing. In their place, a new 18-inch silver painted steel wheel becomes the Pro dually wheel, the 18-inch polished forged aluminum wheel becomes the included wheel on the SLE and SLT duallys, and the LT235/80R18 all-terrain is now the only dually tire GM lists. Dually rolling stock 2026 Sierra 3500 HD 2027 Sierra 3500 HD Pro 17-inch painted steel with painted center caps 18-inch silver painted steel with a painted center cap SLE and SLT 17-inch painted steel with chrome wheel skins; 18-inch polished forged available 18-inch polished forged aluminum with a chrome center cap, included Denali and Denali Ultimate 18-inch polished forged with Denali center caps Unchanged: 18-inch polished forged with Denali center caps Max Trailering Package 18-inch polished forged included Unchanged: 18-inch polished forged included Dually tire LT235/80R17E standard; LT235/80R18 with the 18-inch wheel LT235/80R18 all-terrain, the only dually tire listed Spare 17-inch or 18-inch, matched to the wheel 18-inch on every dually Nothing here was invented or borrowed from a press release. Where GM is silent, this post is silent too. The trim-by-trim detail sits in the 2027 Sierra 3500 HD wheels and tires section. Which 18-Inch Wheel Comes on Which 2027 Dually? Two wheels cover the whole dually lineup. The Pro gets the 18-inch silver painted steel wheel with a painted center cap. The SLE, SLT, Denali, and Denali Ultimate get the 18-inch polished forged aluminum wheel, with a chrome center cap on the SLE and SLT and Denali caps on the two Denali trims. A Pro ordered with the Max Trailering Package also moves up to the polished forged wheel, because that package includes it. For the SLE and SLT that is a quiet upgrade. In 2026 those two duallys came on the painted steel wheel with chrome skins, and the polished forged wheel was something you added. For 2027 it comes with the truck. If you have ever pulled a skin off to get at a lug nut in a February wind on Highway 12, or watched one work loose and go rolling into a ditch, you already know why that matters more than it looks. One rule has not moved: the dually itself. Dual rear wheels still require a long bed and the 14,000-pound GVWR, and they are offered on the Pro, SLE, SLT, Denali, and Denali Ultimate. The AT4 is still single rear wheel only, so no 2027 AT4 wears these wheels. If you are still working out which side of that line you belong on, the single rear wheel or dually post lays out the whole decision with the rated 2026 numbers attached. What a wheel change does not change A different wheel and tire size does not by itself make a truck tow or carry more. Ratings come from the whole package of frame, springs, axles, brakes, engine, and tires together, and GM publishes them by configuration. Treat any site quoting a 2027 rating today with suspicion, and read the trailering information label in the driver door jamb of the truck you actually take home. Why Does One Tire Size Across Six Wheels Matter Out Here? Because a dually is a six-tire truck plus a spare, and you are usually a long way from a tire shop when you find that out. With one size on the whole 2027 dually lineup, the shop in Mobridge or Selby stocks one size, your spare fits any corner, and a used pair off a trade fits your neighbor's truck. Before 2027, a Pro or an SLE on 17s and a Denali on 18s needed two different tires on the same yard. The practical picture for a cow-calf outfit or a hotshot deck: you are buying six tires at a time, and they wear at different rates because the inside duals live a harder life than the outsides. Rotating on a schedule and checking pressure cold, before the gravel heats them up, is the cheapest maintenance on a one-ton. A gooseneck load of bales up the grade out of the river breaks on a July afternoon is exactly the moment an underinflated inside dual decides to quit. The 2027 dually tire is an all-terrain, which is the tread I would have recommended anyway for county gravel and a winter that runs from the first snow contract in November into March. Six matching all-terrains and a matching spare is a simpler truck to own than it sounds on paper. If you run a 2026 dually and a 2027 dually side by side A 2026 Denali dually, a 2026 truck with the Max Trailering Package, and every 2027 dually all take the same LT235/80R18. A 2026 Pro, SLE, or SLT dually on the 17-inch steel wheel does not. Check the sidewall before you assume a spare crosses between two trucks in your yard. 5. IMAGE BREAK Six tires, one size, one spare. For 2027 every Sierra 3500 HD dually rolls on 18-inch wheels and LT235/80R18 tires, whether it is a Pro work truck or a Denali Ultimate. Did Anything Change on the Single-Rear-Wheel Side? No. The single-rear-wheel ladder carries over exactly as it was. The Pro starts on an 18-inch painted steel wheel and can move to the 18-inch machined aluminum with dark grey accents, which is included on the SLE and SLT. The SLE and SLT can step to a 20-inch bright-face wheel with dark painted pockets. The AT4 keeps its 20-inch high-gloss black wheel, the Denali its 20-inch ultra-bright machined wheel with chrome inserts, and the Denali Ultimate its 20-inch with gloss black inserts. Tires on that side are unchanged too: an LT275/70R18E all-terrain on the 18-inch wheels, an LT275/65R20 all-terrain on the 20s, and the BFGoodrich KO3 as an AT4 option. Dealer-installed 20-inch wheels remain available on the AT4, Denali, and Denali Ultimate. Two limits are worth repeating because they come up on the lot every month. The 20-inch wheels are single-rear-wheel only, so there is no 20-inch dually from the factory in 2027 any more than there was in 2026. And there is still no 22-inch wheel anywhere on the Sierra 3500 HD. If you want a big wheel look, that decision is really a decision to stay on single rear wheels. Does an 18-Inch Wheel Change What the 2027 Truck Can Pull or Carry? Nobody can answer that honestly yet, and I am not going to pretend otherwise. GM has not published 2027 towing, payload, or GCWR figures; those ratings will come in the GM Trailering Guide. The 14,000-pound dually GVWR carries over unchanged for 2027, which tells you the dually side of the lineup is not being repositioned, but a GVWR is not a trailer rating. Here is the honest reference point. The 2026 Sierra 3500 HD is rated by GM, properly equipped, at up to 20,000 pounds conventional, and a 2026 4WD Crew Cab long bed dually with the Duramax is rated at 31,000 pounds on a gooseneck, 31,440 pounds in 2WD. Those are 2026 numbers on 2026 trucks, and they sit in the 2026 Sierra 3500 HD buyers guide with the full configuration attached. I will not carry them forward to a 2027 until GM does. On the truck itself, the last word is always the same: the trailering information label in the driver door jamb carries the tongue weight, conventional, gooseneck, and fifth-wheel ratings for that specific VIN. That label is standard on every Sierra 3500 HD. If you are weighing an order against a rated truck sitting in our yard, the buy now or order a 2027 post puts both columns side by side. HOW-TO How to Spec Wheels and Tires on a 2027 Sierra 3500 HD Dually Order There is less to decide than there used to be, which is the good news. Work through it in this order and you will not paint yourself into a corner. Commit to the dually first: dual rear wheels require a long bed and the 14,000-pound GVWR, and they rule out the AT4. That choice drives the wheel, not the other way around. Pick the trim and let the wheel follow: a Pro dually lands on 18-inch painted steel, and an SLE, SLT, Denali, or Denali Ultimate dually lands on the 18-inch polished forged wheel with no extra line on the order. Add the Max Trailering Package early if you want it: on a Pro it brings the polished forged wheel and the LT235/80R18 tire with it, and it remains a 2WD Regular Cab dually Duramax option, so it cannot be bolted on later. Count your spare into the plan: the 2027 dually spare is an 18-inch, so a spare carried on a trailer or in a shop for an older 17-inch dually will not cross over. Ask your tire shop to stock the size: give them the LT235/80R18 before the truck lands, especially if you run more than one dually and want a matched set on hand for harvest. Read the door-jamb label the day it arrives: compare the trailering information label to the trailer you already own before you hook to anything, and set your cold pressures from the placard rather than from the last truck. QUICK OVERVIEW TABLE Is the 18-Inch Change a Reason to Order a 2027 Dually? Worth it if Skip it (buy a rated 2026 dually) if You run more than one dually and want every truck on one tire size You want the polished forged wheel on an SLE or SLT without adding it You are tired of chrome wheel skins and the caps that go with them Your order can build over the winter in the color and package you want You need a published trailer rating and payload figure before you sign Calving or a snow contract needs the truck in the yard this fall You already stock 17-inch dually tires and just replaced a full set You want to drive, weigh, and scale the exact truck before you buy it KEY TAKEAWAYS Key Takeaways The 17-inch dually wheel, its painted caps and chrome skins, the LT235/80R17E tire, and the 17-inch spare are all gone for 2027. Every 2027 Sierra 3500 HD dually rides on 18-inch wheels: silver painted steel on the Pro, polished forged aluminum on the SLE, SLT, Denali, and Denali Ultimate. LT235/80R18 is now the only dually tire, so one size and one spare cover the whole lineup. The single-rear-wheel wheel and tire ladder is unchanged; 20-inch wheels stay single-rear-wheel only and there are still no 22-inch wheels. No 2027 towing or payload rating has been published; the dually GVWR stays at 14,000 pounds and the door-jamb label is the final word on any truck. FAQ Frequently Asked Questions Are 17-inch wheels still available on a 2027 GMC Sierra 3500 HD dually? No. The 17-inch painted steel dually wheel, its painted center caps, its chrome wheel skins, the LT235/80R17E tire, and the 17-inch spare are all absent from the 2027 listing. Every 2027 dually is built on 18-inch wheels. What tire size does a 2027 Sierra 3500 HD dually use? LT235/80R18, in an all-terrain tread, on all six wheels, with a matching 18-inch spare. It is the only dually tire GM lists for 2027, so a Pro work truck and a Denali Ultimate take the same tire. Can I order a 2027 Sierra 3500 HD dually with 20-inch or 22-inch wheels? No. The 20-inch wheels are offered on single-rear-wheel trucks only, the same as in 2026, and no 22-inch wheel is offered anywhere on the Sierra 3500 HD. A dually is an 18-inch truck for 2027. Does the 18-inch wheel raise the 2027 towing or payload rating? Unknown, because GM has not published 2027 towing, payload, or GCWR figures yet; they will appear in the GM Trailering Guide. The dually GVWR stays at 14,000 pounds for 2027. Every rating on a delivered truck is printed on the trailering information label in the driver door jamb, and we read it with you before you hook to anything. MY TAKE My Take on the End of the 17-Inch Dually This is a small change that makes a working truck easier to own, and those are my favorite kind. One tire size across the whole dually lineup means one size on the shelf, one spare that fits any corner, and no chrome skins to fight with on a cold morning. The SLE and SLT buyers come out ahead twice, because the wheel they used to pay extra for now comes with the truck. What I will not do is turn a wheel change into a capability story. Until GM publishes the 2027 ratings, the truck with numbers you can take to the scale is the 2026 sitting in our yard, and we keep rated Sierra 3500 HDs in stock. If you are matching a truck to a trailer that is already close to the line, buy the rated one. If you are replacing a truck next spring and you want a specific color, cab, and package, order the 2027 and let it build over the winter. The full 2027 detail is in the 2027 GMC Sierra 3500 HD buyers guide. Come by Beadle Chevrolet GMC at 2200 US Hwy 12 in Mobridge, or call or text 605-845-7277, and we will pull a tape on the trailer you own and spec the truck around it. BOTTOM CTA View Sierra 3500 HD Inventory Get Pre-Qualified Contact Beadle Chevrolet GMC ABOUT THE AUTHOR (LOCKED) About the Author Lexy Tabbert — Beadle Chevrolet, Mobridge, SD Lexy Tabbert is the Director of Sales and Marketing at Beadle Chevrolet in Mobridge, South Dakota. She covers Chevrolet and GMC vehicles, trim comparisons, and buyer guidance — helping families, ranchers, and ag operators across the region find the right truck and configuration for their needs. Learn more about Lexy.

This is the question I get most often right now, usually standing in the yard beside a gooseneck. GM has shown what the 2027 GMC Sierra 3500 HD will carry for equipment, and there are real improvements in it. GM has not published a single 2027 towing, payload, or GCWR number. Meanwhile there are rated 2026 one-tons in our row with every figure already stamped in the door. So the decision is not really new truck versus old truck. It is a verified number versus a better equipment list, run against your calendar. If you want the 2027 change list first, the what-is-new-for-2027 post lays it out. This one is about which truck you should be signing for. 2. TOP CTA View Sierra 3500 HD Inventory Get Pre-Qualified 3. ON THIS PAGE On This Page What is sitting on the lot right now What a 2026 tells you that a 2027 cannot yet What ordering a 2027 actually gets you The calendar test: when do you need the truck What is the same either way How to decide in one afternoon 4. CONTENT SECTIONS What Is Sitting on the Lot Right Now? One-ton trucks you can walk around today. On our lot as this is written we have two 2026 SLT Crew Cab long bed 4WD Duramax duallys, one Volcanic Red Tintcoat and one Summit White, and a 2026 Denali Crew Cab standard bed 4WD Duramax with single rear wheels in Onyx Black on the dark wheel package and all-terrain tires. That mix is not an accident. The SLT dually is the truck a cow-calf outfit or a hay operation ends up in once the loaded stock trailer or the 40-foot flatbed beats the payload of a three-quarter-ton, and the Denali single-rear-wheel is the quiet way to pull a big fifth-wheel and still park in the garage at home. If you are not sure which side of that line you fall on, the single-rear-wheel-or-dually post walks the trailer math and the shop door. Ask us for current pricing on any of them, because incentives move monthly and the window sticker is the honest place to have that conversation. What matters for this decision is that these trucks exist, you can scale them, and their trailering information labels are already printed. What Does a 2026 Tell You That a 2027 Cannot Yet? Every capability number. GM has published conventional towing, gooseneck towing, payload, GCWR, and curb weight for the 2026 Sierra 3500 HD by cab, bed, drive, engine, and rear-wheel count. For 2027 GM has published the equipment and the GVWR menu and nothing else; 2027 output and trailer ratings will be published in the GM Trailering Guide. What you are matching to a trailer 2026 on the lot 2027 on order Conventional tow rating Published; up to 20,000 lb with the Duramax Not published Gooseneck rating, Crew Cab long bed 4WD dually, Duramax 31,000 lb Not published Payload, that same dually 5,647 lb diesel, 6,378 lb gas Not published GVWR, dually 14,000 lb 14,000 lb, unchanged GVWR, single rear wheel ceiling 12,250 lb 12,700 lb Curb weight, so you can do your own math Published Not published Door-jamb trailering label Printed and on the truck Printed when the truck is built Those 2026 figures are properly equipped ratings and they belong to specific configurations, which is the whole point of the 2026 towing section. The 2WD version of that Crew Cab dually is rated a little higher at 31,440 pounds with a gooseneck, and a dually with a fifth-wheel hitch runs on a 32,000-pound combination ceiling instead. The gooseneck dually post runs the worked examples against a loaded stock trailer and a hay flatbed. Why this matters more at the one-ton Half-ton buyers can shop on feel. You cannot, because you are usually within a few hundred pounds of something. Whichever year you buy, read the trailering information label in the driver door jamb of that exact truck and weigh the loaded rig at a scale before you trust a number off any website, mine included. What Does Ordering a 2027 Actually Get You? Four verified improvements and the truck you actually wanted instead of the one in the row. Every 2027 dually rides on 18-inch wheels and LT235/80R18 tires, so a dually operation runs one tire size across six corners and the spare. Single-rear-wheel GVWR climbs 250 to 450 pounds on every configuration, to a ceiling of 12,700 pounds. Adaptive cruise control becomes standard on all six trims, Pro included. And the Technology Package, the rear camera mirror plus the head-up display, reaches the SLT for the first time. Two of those are worth real money to a working outfit. The one tire size is a parts-room simplification you feel at replacement time, and the camera mirror on an SLT is the piece I push hardest for anyone pulling a tall gooseneck, because a loaded trailer blanks a mirror and the camera sees past it. What a higher GVWR does and does not promise is its own conversation, and the 2027 GVWR post takes it apart. The other thing an order gets you is exactness. You pick the cab, the bed, the color, gooseneck prep, snow plow prep, dual alternators, upfitter switches, and the seat you actually want, instead of taking the nearest match. An order placed this fall typically builds and ships over the winter; ask us where the order bank sits before you count on a date. The full 2027 equipment detail is in the 2027 Sierra 3500 HD buyers guide. 5. IMAGE BREAK A dually is the same width in 2026 and 2027. Measure your shop door, your gate, and the car wash before the year on the title matters. The Calendar Test: When Do You Actually Need the Truck? This settles the question for most people faster than any spec sheet. Write down the first date the truck has to be working, then decide. A truck ordered this fall builds over the winter, and winter is exactly when a one-ton around here earns its keep. If you have a snow contract running November through March, a blade to hang, and beacons to wire, you want a truck in the yard now, not a build number. Same answer if calving starts in February and the truck is the feed rig and the vet run. Same answer again if your hay contract or a custom harvest commitment has you hooked to a gooseneck by June, because a spring build date leaves no margin if anything slips. Order the 2027 if the truck you have now will finish this winter honestly, if you are replacing on a planned cycle rather than a breakdown, or if you are adding a truck rather than swapping one. Pheasant opener in mid-October and the fall run are on the near side of that line; next summer's hay is comfortably on the far side of it. What Is the Same Either Way? More than most people expect, which is why this decision is lower-stakes than it feels. The six trims, the cab and bed rules, the dually rule that ties dual rear wheels to a long bed and the 14,000-pound GVWR, the AT4 staying single rear wheel, the Denali Ultimate staying diesel, and the Max Trailering Package rules are identical in both years. The working hardware carries over too: the hitch with 7-pin and 4-pin connectors, the integrated trailer brake controller, hitch guidance, the trailering information label, gooseneck prep on any trim, snow plow prep on any trim including duallys with 4WD, the exhaust brake and block heater with the Duramax, dual alternators, upfitter switches, and the power take-off transmission on a Pro or SLE diesel. All eight colors carry over with nothing added and nothing dropped. Financing is the same conversation in both cases, and you can get pre-qualified before you decide which year you are buying. Trade values do not wait on a model year either; bring the old truck by and we will number it now so the comparison is real instead of hypothetical. HOW-TO How to Decide in One Afternoon You do not need a spreadsheet. You need a scale ticket, a calendar, and an honest look at the trailer you actually pull. Weigh the loaded trailer and the pin: not the brochure weight, the real one, loaded the way you load it in October. Compare it to a rated truck: use the door-jamb label on a 2026 dually in our row. If you are inside its numbers with margin, the year on the title is a preference, not a requirement. Write down the first working date: snow contract, calving, hay, harvest. If that date is before spring, buy off the lot. List the equipment you would change: if the trucks here already have the cab, bed, prep, and drivetrain you need, the 2027 advantages are nice rather than decisive. Price both paths the same day: ask us for current pricing on a 2026 in stock and for an order sheet on a 2027, with your trade numbered on both. Decide on the number you can verify: if your rig is close to the limit, take the truck whose rating is already printed and hook to it this week. QUICK OVERVIEW TABLE So Which One Should You Buy? Ordering a 2027 is worth it if Skip it and buy the rated 2026 if Your current truck honestly finishes this winter You run several duallys and want one 18-inch tire size You want a spec the lot does not have: cab, bed, color, prep You are an SLT buyer who wants the camera mirror You carry heavy single rear wheel and want the higher GVWR Your loaded rig is anywhere near the limit A snow contract, calving, or a hay commitment needs the truck first You want to scale and drive the exact truck before signing The dually in our row is already the cab, bed, and drivetrain you need You are replacing a truck that is already down KEY TAKEAWAYS Key Takeaways The 2026 Sierra 3500 HD duallys on our lot have published towing, payload, GCWR, and curb weight; the 2027 has none of those yet. A 2027 order brings 18-inch wheels on every dually, a 12,700-pound single-rear-wheel GVWR ceiling, standard adaptive cruise, and the Technology Package on the SLT. The dually GVWR, the trim ladder, the cab rules, the trailering hardware, and all eight colors are the same in both years. If your first working date is before spring, or your rig is close to the limit, buy the rated truck. Either way, the trailering information label in the driver door jamb is what you hook to, not a website. FAQ Frequently Asked Questions Will the 2027 Sierra 3500 HD tow more than the 2026? Nobody can tell you yet, because GM has not published a 2027 trailer rating. What is known is that single-rear-wheel GVWR rose and the dually GVWR did not. The rated 2026 Crew Cab long bed 4WD dually with the Duramax pulls up to 31,000 pounds with a gooseneck, properly equipped, and up to 20,000 pounds conventional. How long does it take to get a 2027 Sierra 3500 HD I order? An order placed this fall typically builds and ships over the winter, but I will not promise you a date, because order banks and build weeks move. Call or text 605-845-7277 and we will tell you where the window sits the day you ask. Is a 2026 Sierra 3500 HD dually going to feel dated next to a 2027? No. Same six trims, same cabs and beds, same frame and suspension rules, same trailering hardware, same interiors and screens, same eight colors. The visible differences are the dually wheel size and a few standard-equipment items, and a 2026 SLT dually with gooseneck prep does the same work on the same roads. Should I order a 2027 if I want a two-wheel-drive crew cab dually with the Duramax? That combination is not on the 2027 list as GM has it today; the Duramax is shown on 4WD models and the 2WD Regular Cab. If a 2WD crew dually with the diesel is what you want, a 2026 is the straightforward answer, or order the 2027 as a 4WD. MY TAKE My Take on Buying Now Versus Ordering For most of the people I sell one-tons to, the rated 2026 is the right answer this fall, and it is not close. You are hauling at capacity, your first working date is on the near side of spring, and a printed door-jamb label is worth more to you than an 18-inch wheel you would have grown into anyway. The people who should order are the ones buying on a plan instead of a breakdown: the outfit standardizing a fleet on one tire size, the SLT buyer who wants the camera mirror, the operator who wants a specific cab, bed, and prep combination that nobody stocks. That is a good order to place, and I will happily write it. Read the 2027 GMC Sierra 3500 HD buyers guide and the 2026 buyers guide side by side, then come see the trucks. We are at 2200 US Hwy 12 in Mobridge, weekdays 8:00 a.m. to 5:30 p.m. and Saturday until noon, or call or text 605-845-7277 and we will put a rated truck and an order sheet in front of you at the same table. BOTTOM CTA View Sierra 3500 HD Inventory Get Pre-Qualified Contact Beadle Chevrolet GMC ABOUT THE AUTHOR (LOCKED) About the Author Lexy Tabbert — Beadle Chevrolet, Mobridge, SD Lexy Tabbert is the Director of Sales and Marketing at Beadle Chevrolet in Mobridge, South Dakota. She covers Chevrolet and GMC vehicles, trim comparisons, and buyer guidance — helping families, ranchers, and ag operators across the region find the right truck and configuration for their needs. Learn more about Lexy.