Truck fit guide / Three-quarter-ton truck
Truck Bed Camper for GMC Sierra 2500
The Sierra 2500 fits both Kimbo platforms with three-quarter-ton payload margin — Denali HD just needs a closer look at the sticker.
Recommended Kimbo
Kimbo 8
From $42,990
Compatible generations
K2HD, T1HD
2015–2019, 2020+
Payload range
2,960–3,910 lb
From your door-jamb sticker — cargo budget for your exact truck.
Tailgate rule
Needs 6.5'–8' bed
Bed length determines tailgate behavior.
How it fits
Why a Kimbo works on a GMC Sierra 2500.
The Sierra 2500 HD is the GMC-badged twin of the Silverado 2500 HD, same frame, same Duramax/Allison drivetrain on diesel-equipped trucks, same bed dimensions. For Kimbo install purposes the trucks are interchangeable. K2HD generation (2015–2019) and T1HD generation (2020+) both fit either Kimbo with comfortable margin.
Trim selection mostly doesn't matter on a three-quarter-ton truck — Sierra 2500 SLE, SLT, AT4, and AT4X all carry payload that exceeds either Kimbo's needs by a wide margin. The exception is Denali HD: same trim-package payload reduction story as the Sierra 1500 Denali (sunroof, 22" wheels), but on a heavier truck. Denali HD still fits both Kimbos, but verify your specific door-jamb sticker — some Denali HD configurations land closer to 2,800 lb than the typical 3,500 lb most Sierra 2500s carry.
AT4 and AT4X are the off-road-tuned Sierra 2500 trims. AT4 sits on standard suspension with off-road tires and styling, fits cleanly. AT4X sits taller on Multimatic shocks with significant suspension travel, fits with airbags and possibly jack-bracket extensions, but the truck handles a Kimbo 8 well in real-world use.
Watch — Inside a Kimbo
Inside a Kimbo Camper — Full Walkaround Tour
Down2Mob Overland walks through a Kimbo 6 — 1.1M views. Exterior walkaround, interior tour, and the lightweight hand-riveted aluminum hard-side construction that makes the Kimbo work on midsize and full-size trucks alike.
By generation
Year-by-year fit notes.
Truck-camper fit isn't one-size-fits-all across model years — frame, cab clearance, and suspension change between generations. Here's where each GMC Sierra 2500 sits.
2015–2019
GMC Sierra 2500 K2HD (2015–2019)
2020+
GMC Sierra 2500 T1HD (2020+)
The math
Your payload margin, calculated.
Real numbers for a fully-provisioned Kimbo install on a GMC Sierra 2500 at the middle of its payload range. Substitute your own door-jamb sticker for a precise calculation.
Calculating for
- GMC Sierra 2500 payload (mid-range)+ 3,435 lb
- Kimbo 8 (typical load)− 1,446 lb
- Passengers (cab)− 340 lb
Remaining margin
+1,649 lb
Comfortable buffer
Calculated using the midpoint of the GMC Sierra 2500's published payload range and a typically-loaded Kimbo, plus cab passengers. The Kimbo 8 rides from 1,125 lb base dry to ~1,660 lb fully loaded (modules + water + propane + jacks + gear). Your specific truck's door-jamb sticker is the cargo budget that counts — trim packages, options, and tow packages can swing this by 200–500 lb — and your rear axle rating (GAWR) on the same label is the structural limit a slide-in actually pushes against. Travelling lighter, a higher-payload trim, and rear airbags add real margin.
Want to run your own door-jamb number — or check a different camper? Use the Truck Camper Payload Calculator.
The Kimbo team's pick
If we were buying a GMC Sierra 2500…
If we were buying a Sierra 2500 for a Kimbo, we'd get a T1HD SLT or AT4 Crew Cab with the 6.75' Standard Bed and the 6.6L Duramax diesel + Allison transmission. AT4X if you specifically want the off-road dynamics. Skip Denali HD unless you've already ordered one, the trim works against camper margin.
Recommended platform
From $42,990
Kimbo 8
Full-size living. Wet bath, queen bed, extended off-grid systems.
- — 1,125 lb base
- — R10 insulation, four-season ready
- — Queen cabover bed + dedicated wet bath
- — Hand-riveted aluminum monocoque shell
GMC Sierra 2500 questions
GMC Sierra 2500-specific questions, answered.
Considering a different truck?
Related fits.
Talk through your GMC Sierra 2500.
Door-jamb sticker, intended use, modifications you're considering — bring it all by. We'll tell you honestly whether the rig will work the way you want it to.