The 2026 GMC Sierra 3500HD is a one-ton that a lot of buyers keep for a decade, and a flatbed is usually the upgrade that makes it earn its keep. Whether you are converting a pickup or buying a cab and chassis, here is what fits the 2026 Sierra 3500HD and how to spec it.

Cab-to-axle options

CA length	Deck length	Best use
60″ CA	8’6″ flatbed	Ranch, construction, general work — best stock availability
84″ CA	9′ or 11′ flatbed	Hotshot, welding rigs, long stock
Pickup conversion	8′ or 8’6″	Existing truck, box removed

SRW vs DRW on the Sierra 3500HD

Single-rear-wheel Sierra 3500HD trucks carry roughly 3,800–4,500 lb and are the better choice if the truck doubles as a daily driver. The dually pushes past 6,000 lb on many configurations and is the right call for any serious gooseneck work. A DRW flatbed is about 96 inches wide versus roughly 86 inches on an SRW bed — measure your gate and your shop door before you decide.

• DRW gives more usable deck width for pallets and hay — a real productivity difference.
• SRW is easier to park and slightly cheaper to shoe when tires come due.
• Beds are configuration-specific; an SRW bed will not properly cover DRW tires.
• Both take a gooseneck ball and rear receiver as standard equipment on the beds we stock.

Recommended flatbeds

• CM RD — the default choice. Gooseneck ball, rear receiver, sealed wiring, headache rack, and the best installed price in its class most weeks.
• Bedrock Granite — heavier deck and a cleaner rack for buyers hauling equipment or hay every day.
• NXG — the entry-price flatbed on our lot; straightforward, durable, and quick to install.
• Norstar SR — heavier gauge steel and strong resale value in Texas.

Towing context

The 2026 Sierra 3500HD DRW is rated for gooseneck loads in the 30,000+ lb range depending on drivetrain, but your practical limit is rear axle weight rating and tongue weight, not the advertised maximum. Aim for roughly 20–25 percent of trailer weight on the ball, keep the total under your GAWR, and remember that a flatbed positions the ball correctly for you rather than relying on a bolt-in hitch.

Pricing and installation

Flatbeds for the Sierra 3500HD start in the mid $3,000s installed and run to the low five figures for skirted models with under-deck boxes. In-stock beds are typically installed the same or next business day at our Wharton shop. Browse the flatbed bodies and truck beds we have on the ground right now.

Talk to Someone Who Installs These Every Week

We stock, spec, and install these bodies at our shop in Wharton, TX, and we serve buyers across Texas and Louisiana. Call us to discuss which is right for your truck — we’ll go over cab-to-axle, wheel configuration, hitch rating, and total installed cost before you commit.

📞 Call (979) 532-1486 — Star Truck Equipment, 2507 County Rd 231, Wharton, TX 77488. Most in-stock bodies are installed in one business day.