2026 GMC Sierra 2500 accessories packages

2026 Sierra 2500HD Towing at Beach Buick GMC: 20,000 LBS When Properly Equipped
For conventional trailering, the 2026 GMC Sierra HD reaches a maximum rating of 20,000 pounds in both Sierra 2500 HD and Sierra 3500 HD form when equipped with the available 6.6L V8 L5P turbodiesel Duramax. On the 2500 HD side, that max applies to select Crew Cab trims with the optional NHT Max Trailering Package.
Two Engines, Two Towing Stories:
• 6.6L V8 Gas L8T — 401 hp / 464 lb-ft — Paired with the Allison® 10-speed automatic. The Double Cab Pro heavy-duty gas pickup delivers up to 14,500 lbs of towing capacity and 3,422 lbs payload capacity. Perfect for contractors who want low diesel maintenance.

• 6.6L Duramax Turbo-Diesel L5P — 470 hp / 975 lb-ft — The GMC Sierra 2500HD Diesel Denali Ultimate heavy-duty performance offers an impressive 20,000-lb towing capacity and 3,096-lb payload. This is the Myrtle Beach boat hauler and 5th-wheel king.

The Packages That Make It Happen at Beach Buick GMC:
1. Max Trailering Package (NHT) — Includes 9.76" rear axle, enhanced cooling, higher GCWR, trailer brake controller, and factory puck system. Required to hit 20,000 lbs on 2500HD. On the 2500 HD side, that max applies to select Crew Cab trims with the optional NHT.

2. Gooseneck / 5th Wheel Prep Package — Factory-installed hitch platform to accept gooseneck or 5th wheel hitch — no aftermarket drilling. Rated for 20k gooseneck, 18,200-22,000 fifth-wheel depending on trim (SLE/SLT up to 22,000 lbs, AT4X 18,500 lbs).

3. ProGrade Trailering Tech — 14+ camera views including transparent trailer, trailer tire pressure/ temp, jackknife alert, trailer side blind zone, and in-vehicle trailering app with pre-departure checklist.

At Beach Buick GMC, 922 Frontage Rd E, we have 2500HD SLE and SLT with Gooseneck Prep on the ground, plus Denali Duramax models arriving weekly. Bring your trailer specs — we'll match GVWR, GCWR, and payload on the spot. Call (843) 448-4426.