One Ton · Ordered to Spec
GMC Sierra 3500HD Work Trucks in Maine
The 3500HD is the one-ton Sierra, and the reason to buy one is a single number: payload. GMC rates it at 7,290 lbs against 4,049 for the 2500HD — close to double, from the same cab, the same engines and the same Allison transmission.
We do not have one on the ground at the moment, so this is an order. If you need a GMC heavy-duty truck you can look at today, we keep a dozen Sierra 2500HDs at Quirk GMC Rockland.
What it means for your business
Payload is the entire argument
GMC puts the two side by side in their own FAQ: the 2500HD tows up to 22,390 lbs and carries 4,049; the 3500HD tows up to 36,000 and carries 7,290. The towing gap is dramatic but most businesses never approach it. The payload gap is the one that bites — add a plow, a bed full of material and two crew, and a three-quarter-ton runs out long before the 3500HD does. If you have ever weighed a loaded 2500HD and not liked the answer, this is the truck that fixes it.
Same truck to drive, more rating underneath
The cab, the 6.6L gas V8, the Duramax and the Allison 10-speed are shared with the 2500HD and with the Silverado HDs. Nothing about the driving experience or the maintenance changes. You are buying axle, spring and rating — which is exactly why the decision should be made on weight rather than on how the truck feels on a test drive.
The trim ladder runs all the way up, and ours usually does too
Pro, SLE, SLT, AT4, AT4X, Denali and Denali Ultimate — the same range as the 2500HD. Worth knowing how our GMC stock tends to sit: of twelve Sierra 2500HDs only two are Pro, the fleet trim, and the rest are SLE and above. If you want a one-ton in bare work spec, say so at order time rather than assuming it is what will arrive.
Or buy the Silverado 3500HD, which we do stock
Mechanically it is the same truck with a different badge and no MultiPro tailgate, and we have them on the ground — including two already carrying Reading service bodies. If the job is a body rather than a bed, look at the Silverado 3500HD or the chassis cabs instead, where our stock actually is. The Sierra is the right call when you want the better cab and are willing to order it.
Ordering is normal at this end of the range
One-ton pickups get specified rather than picked off a lot: cab, bed, drivetrain, engine and whether a plow or a body is going on all interact, and the wrong combination is expensive to discover later. Tell the fleet team what the truck has to carry and what is going on it, and they will quote the build and give you a realistic date.
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
- 6.6L V8 gas
- 401 hp · 464 lb-ft
- Standard, lighter and cheaper to run — and on a truck bought for payload, the lighter engine leaves more of the rating for your load.
- Duramax 6.6L Turbo-Diesel V8
- 470 hp · 975 lb-ft
- What the 36,000 lb tow figure is built on. Heavier, so it costs payload.
- Transmission
- 10-speed Allison automatic
- With both engines, identical to the 2500HD and to the Silverado HDs.
Hauling & towing
- Max payload
- 7,290 lbs
- Against 4,049 on the Sierra 2500HD. This is the number you are buying.
- Max towing
- 36,000 lbs
- GMC’s Sierra HD maximum, and it belongs to this truck rather than the 2500HD — reached on a dual-rear-wheel build with the Duramax.
- Trim range
- Pro · SLE · SLT · AT4 · AT4X · Denali · Denali Ultimate
- Pro is the fleet trim. Ask for it explicitly if that is what you want.
- MultiPro tailgate
- Six functions, available
- Inner gate step, load stop and work surface. The Silverado has no equivalent.
- Rear wheels
- Single or dual
- Duals are where the highest payload and towing ratings live; singles are easier to live with day to day.
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 fleet trim and the one to specify if the truck is a tool. Equivalent to a Silverado Work Truck.
The sensible middle — better seats and more technology without luxury pricing. Where most of our GMC stock sits.
Off-road suspension and skid plates, and on the AT4X a factory lift with DSSV dampers. Worth it for rough site access; wasted on a highway truck.
The top of the range with the full one-ton rating underneath. Defensible when the truck doubles as the vehicle you meet customers in.
Bodies that go on this chassis
A one-ton pickup takes a plow and a dump insert readily, and the bed will come off for a service body or flatbed. If that is the plan from the start, say so before the truck is ordered — cab and bed choice constrain what will mount, and a chassis cab is usually the better buy when the body is the point. We stock Silverado 3500HD chassis cabs already bodied if you would rather not wait.
We order this one
There is no GMC Sierra 3500HD on our lot today, and that is normal for this chassis — the body decides the specification, so it is ordered rather than floored. Tell the fleet team what is going on the back and they will quote the chassis and the upfit as one job.
Questions businesses actually ask
Do you have any Sierra 3500HDs in stock?
Not at the moment, so these are ordered. We do keep a dozen Sierra 2500HDs at Quirk GMC Rockland if a three-quarter-ton covers the job, and Silverado 3500HDs — mechanically the same one-ton — on the ground elsewhere in the group, some already carrying service bodies.
Thanks — good to know.
Sorry that didn't answer it. Want to ask the commercial team directly?
Sierra 2500HD or 3500HD?
Payload decides it. GMC rates the 2500HD at 4,049 lbs and the 3500HD at 7,290 — nearly double, from the same cab and the same engines. If the truck runs loaded most days, or a plow and a full bed go on together, you want the 3500HD. If the load is occasional, the 2500HD is cheaper, rides better empty, and we have twelve of them.
Thanks — good to know.
Sorry that didn't answer it. Want to ask the commercial team directly?
Why not just buy the Silverado 3500HD?
You might well should. It is the same truck mechanically — same engines, same Allison, same platform — and we actually stock it, including units already fitted with Reading service bodies. The Sierra gives you a better cab and the MultiPro tailgate, which the Silverado cannot be optioned into. If those matter and you are willing to wait for an order, take the Sierra; if not, the Silverado does the same work today.
Thanks — good to know.
Sorry that didn't answer it. Want to ask the commercial team directly?
Gas or Duramax?
On a truck bought for payload, think twice before the diesel. The Duramax is the heavier engine and its weight comes out of the rating before your load does, so the 6.6L gas V8 often leaves you carrying more. Take the Duramax if you genuinely tow heavy — it is what the 36,000 lb figure is built on.
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 GM’s build schedule, and nobody can give you a credible date from a web page. Tell the fleet team the cab, bed, drivetrain, engine and what is going on the truck, and they will come back with a real build date rather than a guess.
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 Heavy Duty, checked 2026-10-01. Ratings vary by configuration and are not a guarantee for any specific vehicle — confirm before purchase.