Bare Frame · Ordered to Spec
GMC Sierra 3500HD Chassis Cab in Maine
A chassis cab is a cab and a frame with no bed — bought so a body builder can put a dump, a service body, a flatbed or a stake body on the back. GMC rates this one at 7,329 lbs of payload, a 14,000 lb GVWR and a 40,000 lb gross combination weight, with 975 lb-ft from the Duramax.
We have none on the ground at the moment, so this is an order — which is how most chassis cabs are bought anyway, because the body decides the specification. If you want a GM chassis cab you can see today, we hold fourteen Silverado 3500HD Chassis Cabs, nine of them already bodied.
Every unit counted here is on the ground today. We don’t list in-transit or factory-ordered vehicles on this website. Ask the fleet team what’s inbound.
What it means for your business
Identical to the Silverado 3500HD Chassis Cab. Choose on availability
GMC and Chevrolet publish the same numbers for this truck — 7,329 lbs of payload, a 14,000 lb GVWR, a 40,000 lb GCWR and 975 lb-ft of Duramax torque — because it is the same chassis with a different grille. Nothing about what it will carry or what will bolt to it changes. So the honest basis for choosing is what is available and where: the Silverado version is on our lot now, and this one is an order.
Cab-to-axle decides the body, and it decides it first
Not wheelbase and not bed length, because there is no bed. Cab-to-axle — the distance from the back of the cab to the centre of the rear axle — is what determines which bodies will physically mount, and it is the first thing any body builder will ask you. GMC offers this chassis in Regular Cab and Crew Cab, and the cab you choose constrains the body length the frame will take. Settle this with the body builder before the truck is ordered.
You are buying rating, not a nicer pickup
A 14,000 lb GVWR against the 11,500 of a single-rear-wheel 3500HD pickup, and 7,329 lbs of payload against roughly 5,300. The frame is straight-railed and built to be cut into, which is a different and cheaper job for a body builder than adapting a pickup. If the plan is a bed with an occasional load, buy the pickup. If the body IS the truck, this is the chassis.
Specify Power Take Off with the truck if the body has hydraulics
A dump hoist, a crane or a heavy liftgate runs off the transmission rather than the battery, and that has to be ordered with the chassis. Retrofitting it after a body is mounted is expensive and rarely tidy. Tell the fleet team what the body has to do, not just what it is called, and they will specify it.
GMC warrants the chassis. The body builder warrants the body
GM states it plainly on its own page: equipment from independent suppliers is not covered by the GM New Vehicle Limited Warranty, and GM is not responsible for those alterations. Two warranties and two phone numbers. On a truck that earns its living through the thing on the back, ask who services the body locally before you commit.
Powertrain & capability
Manufacturer figures for a properly equipped truck. Your specific build will rate differently — confirm the ratings on the unit before you buy a trailer or a body to match it.
Engines
- Duramax 6.6L Turbo-Diesel V8
- 975 lb-ft
- GMC’s maximum available torque for this chassis — the figure the 40,000 lb gross combination rating is built on.
- 6.6L V8 gas
- Available
- The lighter engine, which leaves more of the rating for the body and the load. Worth doing the sum before defaulting to diesel.
- Transmission
- 10-speed Allison automatic
- The same pairing as the Sierra HD pickups and the Silverado chassis cabs.
- Power Take Off
- Specify at order
- Required for a hydraulic body. Not a sensible retrofit.
Hauling & towing
- Max payload
- 7,329 lbs
- GMC’s figure. The body comes out of this before your load does — frequently two tons of it.
- Max GVWR
- 14,000 lbs
- Against 11,500 on a single-rear-wheel 3500HD pickup.
- Max GCWR
- 40,000 lbs
- Truck, body and trailer together.
- Max available torque
- 975 lb-ft
- Duramax. Identical to the Silverado 3500HD Chassis Cab, because it is the same chassis.
- Cab styles
- Regular Cab · Crew Cab
- Cab length trades directly against the body length the frame will carry.
Which trim for the work
Trim on a work truck is a budget decision, not a luxury one. What we actually have on the ground is marked.
The work specification, and what a chassis cab is almost always ordered as. On a truck about to have a body bolted to it, the cab is the last place to spend money.
A better cabin for a driver who spends the whole day in it. Orderable, and occasionally worth it on a truck assigned to one person.
Bodies that go on this chassis
GMC sells this chassis expecting a body on it and says so — a strong foundation for aftermarket upfits, in their words. Decide the body first: it sets the cab, the cab-to-axle, whether Power Take Off is needed, and how much of the 7,329 lbs is left for your load. The body builders working this region — Knapheide, Reading, Dejana, Unicell — all build on this chassis, and our Silverado chassis cabs are on the lot wearing their work if you want to see examples.
In stock now
Nothing is marked down on this model today. Here is what is on the ground across the group.
Questions businesses actually ask
Do you have any in stock?
Not at the moment, so these are ordered. We do hold fourteen Silverado 3500HD Chassis Cabs — the same chassis with a different badge — and nine of those already carry a body, from Knapheide service and platform bodies to Reading and Dejana dumps. If you need a GM chassis cab soon, that is where to look.
Thanks — good to know.
Sorry that didn't answer it. Want to ask the commercial team directly?
Is it really the same as the Silverado 3500HD Chassis Cab?
Mechanically, yes. GMC and Chevrolet publish identical figures — 7,329 lbs of payload, 14,000 lb GVWR, 40,000 lb GCWR, 975 lb-ft — because it is the same chassis. The differences are the grille, the badge and the cabin. Choose on what is available and on which store suits you.
Thanks — good to know.
Sorry that didn't answer it. Want to ask the commercial team directly?
What is cab-to-axle and why does everyone ask about it?
It is the distance from the back of the cab to the centre of the rear axle, and it decides which bodies will physically fit. There is no bed to measure on a chassis cab, so this is the dimension that matters. GMC offers Regular Cab and Crew Cab here; the longer cab leaves less frame for the body. Your body builder should settle it before you order the truck.
Thanks — good to know.
Sorry that didn't answer it. Want to ask the commercial team directly?
Should I just buy a 3500HD pickup instead?
Only if you want a bed. The chassis cab carries 7,329 lbs against roughly 5,300 on a single-rear-wheel pickup and rates 14,000 lbs GVWR against 11,500, and its straight-railed frame is built to be mounted to. If the body is the point, the pickup is the wrong purchase however tempting the price looks.
Thanks — good to know.
Sorry that didn't answer it. Want to ask the commercial team directly?
Do I need Power Take Off?
If the body has hydraulics — a dump hoist, a crane, a heavy liftgate — yes, and it must be specified with the chassis. If the body is a plain service box, a flatbed or a stake body with nothing that moves, you do not. Tell the fleet team what the body has to do rather than what it is called.
Thanks — good to know.
Sorry that didn't answer it. Want to ask the commercial team directly?
How long does an order take?
It depends on the configuration and on the body builder’s queue as much as on GM, and the two get quoted together. Tell the fleet team the body, the finished weight you expect and what has to be powered, and they will come back with a chassis and body quote and a realistic build date.
Thanks — good to know.
Sorry that didn't answer it. Want to ask the commercial team directly?
Tell us what the truck has to do
What you carry, what you tow, whether a body or a plow is going on it — that decides the build. The commercial team specs it, quotes multiple units, and handles factory fleet ordering.
Capability figures compiled from GMC — 2026 Sierra 3500 HD Chassis Cab, checked 2026-10-01. Ratings vary by configuration and are not a guarantee for any specific vehicle — confirm before purchase.