2024 GMC Sierra 2500HD Denali Ultimate
All photo credits
- Photo: 2020 GMC Sierra 2500 Denali HD, Duramax 6.6L, front 2.1.20 by Kevauto, CC BY-SA 4.0, via Wikimedia Commons
- Photo: 2023 GMC Sierra 2500 Denali HD Ultimate in Titanium Rush Metallic, front right by Ethan Llamas, CC BY-SA 4.0, via Wikimedia Commons
- Photo: 2020 GMC Sierra 2500 Denali HD, Duramax 6.6L, rear 2.1.20 by Kevauto, CC BY-SA 4.0, via Wikimedia Commons
- Photo: 2023 GMC Sierra 2500 Denali HD Ultimate in Titanium Rush Metallic, rear left by Ethan Llamas, CC BY-SA 4.0, via Wikimedia Commons
The 2024 GMC Sierra 2500HD Denali Ultimate is a 401-hp 6.6-liter with an allison 10l1000 10-speed automatic and four-wheel drive. It starts at $92,900 MSRP.
It makes 401 horsepower and 464 lb-ft of torque.
The Sierra 2500HD measures 250.7 inches long on a 159.1-inch wheelbase and has a curb weight of 7,516 lb.
| Spec | Value |
|---|---|
| Vehicle | |
| Body Type | Pickup |
| Powertrain | Gas |
| Price | |
| MSRP | $92,900 |
| MSRP with Destination | $94,895 |
| Destination Charge | $1,995 |
| Engine | |
| Engine Type | 6.6L V-8 gasoline / E85 FlexFuel; cast iron block with nodular iron main caps; cast aluminum heads |
| Displacement | 6.6 L |
| Horsepower | 401 hp |
| Torque | 464 lb-ft |
| Valvetrain | Overhead-valve, 2 valves per cylinder, variable valve timing |
| Bore and Stroke | 103.25 x 98 |
| Compression Ratio | 10.8:1 |
| Injection Type | Direct fuel injection |
| Drivetrain | |
| Drive Type | 4WD |
| Transmission | |
| Transmission | Allison 10L1000 10-Speed Automatic |
| 1st Gear | 4.54 |
| 2nd Gear | 2.87 |
| 3rd Gear | 2.06 |
| 4th Gear | 1.72 |
| 5th Gear | 1.48 |
| 6th Gear | 1.26 |
| 7th Gear | 1 |
| 8th Gear | 0.85 |
| 9th Gear | 0.69 |
| 10th Gear | 0.63 |
| Reverse | 4.54 |
| Final Drive | 3.73 |
| Fuel Economy | |
| Recommended Fuel | Regular Unleaded / E85 FlexFuel |
| Suspension | |
| Front Suspension | Independent front suspension with torsion bars; 1.5-in factory-installed lift |
| Rear Suspension | Semi-elliptic, two-stage, multi-leaf springs; 1.5-in factory-installed lift; Multimatic DSSV dampers |
| Brakes | |
| Front Brake Disc | 14.0 x 1.6 in / 355 x 40 mm ventilated disc |
| Rear Brake Disc | 14.1 x 1.3 in / 360 x 34 mm ventilated disc |
| Tires & Wheels | |
| Wheels Front | 18 x 9 in aluminum |
| Wheels Rear | 18 x 9 in aluminum |
| Tires Front | LT305/70R18 MT |
| Tires Rear | LT305/70R18 MT |
| Dimensions & Weight | |
| Length | 250.7 in |
| Width | 81.9 in |
| Height | 82.6 in |
| Wheelbase | 159.1 in |
| Front Track | 69.3 in |
| Rear Track | 70 in |
| Ground Clearance | 11.6 in |
| Approach Angle | 31.6° |
| Departure Angle | 25.7° |
| Curb Weight | 7,516 lbs |
| Interior | |
| Headroom Front | 43.03 in |
| Headroom Rear | 40.12 in |
| Legroom Front | 44.53 in |
| Legroom Rear | 43.4 in |
| Shoulder Room Front | 66.02 in |
| Shoulder Room Rear | 65.3 in |
| Hip Room Front | 61.18 in |
| Hip Room Rear | 60.24 in |
Similar cars
Rivals to the 2024 GMC Sierra 2500HD Denali Ultimate with similar size, power and price from around the same years.
Safety & Recalls
NCAP safety ratings
| Overall | Not rated |
| Frontal crash | ★★★★★ |
| Side crash | ★★★★★ |
| Rollover | Not rated |
Other tested variants (5)
- 2024 GMC Sierra 2500 PU/EC 4WD: overall not rated
- 2024 GMC Sierra 2500 PU/RC 4WD: overall not rated
- 2024 GMC Sierra 2500 PU/CC RWD: overall not rated
- 2024 GMC Sierra 2500 PU/EC RWD: overall not rated
- 2024 GMC Sierra 2500 PU/RC RWD: overall not rated
Recalls
4 recalls on file with NHTSA for the 2024 GMC SIERRA 2500. Not every recall applies to every trim or VIN — check yours at nhtsa.gov/recalls.
Aug 13, 2026 · TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS
General Motors, LLC (GM) is recalling certain 2024-2025 Chevrolet Silverado 2500 and GMC Sierra 2500 vehicles equipped with the enhanced towing option and 20-inch accessory tire/wheel package. The tire information label may state the incorrect rear tire pressure, resulting in underinflated tires and preventing the tire pressure monitoring system (TPMS) from displaying a low tire pressure warning.
Consequence: Driving with underinflated tires can increase the risk of a crash.
Remedy: Dealers will inspect, update the engine control module (ECM) software, apply a tire label overlay, inflate tires to the correct pressure, and perform a tire pressure monitor system (TPMS) re-learn process as necessary, free of charge. Owner notification letters were mailed September 17, 2026. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GM's number for this recall is N262561970. Vehicle Identification Numbers (VIN) involved in this recall became searchable on NHTSA.gov on August 13, 2026.
NHTSA campaign 26V530000
Nov 26, 2024 · LATCHES/LOCKS/LINKAGES:TAILGATE:LATCH
General Motors, LLC (GM) is recalling certain 2024 Chevrolet Silverado HD 2500, 3500, and GMC Sierra HD 2500, 3500 vehicles equipped with power-unlatching tailgates. The tailgate's electronic gate-release switch may short circuit due to water intrusion, which can result in the tailgate inadvertently unlatching while the vehicle is in Park.
Consequence: An unlatched tailgate may open and result in a loss of unsecured cargo, creating a road hazard and increasing the risk of a crash.
Remedy: Owners are advised to check that the tailgate is closed and latched before driving. Dealers will replace the exterior touchpad switch assemblies, free of charge. Owner notification letters were mailed December 17, 2024. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GM's number for this recall is N242469160. This recall is an expansion of NHTSA Recall 24V-060.
NHTSA campaign 24V894000
Feb 1, 2024 · LATCHES/LOCKS/LINKAGES:TAILGATE:LATCH
General Motors, LLC (GM) is recalling certain 2020-2024 Chevrolet Silverado 2500, 3500, GMC Sierra 2500 and 3500 vehicles equipped with power-unlatching tailgates. The tailgate's electronic gate-release switch may short circuit due to water intrusion, which can result in the tailgate inadvertently unlatching while the vehicle is in park.
Consequence: An unlatched tailgate may open while driving and result in a loss of unsecured cargo, creating a road hazard and increasing the risk of a crash.
Remedy: Owners are advised to check that the tailgate is closed and latched before driving. Dealers will replace the exterior touchpad switch assemblies, free of charge. Owner notification letters were mailed May 17, 2024. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GM's number for this recall is N232426400.
NHTSA campaign 24V060000
Aug 3, 2023 · STEERING
General Motors, LLC (GM) is recalling certain 2024 Chevrolet Silverado 2500, 3500, and GMC Sierra 2500, 3500 vehicles. The steering gear shaft may fracture and disconnect from the steering arm.
Consequence: A steering arm that disconnects may result in a total loss of steering control, increasing the risk of a crash.
Remedy: Dealers will inspect and replace the steering gear, if necessary, free of charge. Owner notification letters were mailed September 22, 2023. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GM's number for this recall is N232414720.
NHTSA campaign 23V549000
1 owner complaint to NHTSA for the 2024 GMC SIERRA 2500 HD
Owner Complaints
1 owner complaint filed with NHTSA for the 2024 GMC SIERRA 2500 HD (1 a fire). See all on nhtsa.gov
| Engine | 1 |
Complaints are unverified reports submitted to NHTSA by owners. They cover the whole model year, not a specific trim, and a count alone doesn't show how common a problem is.
Source: US National Highway Traffic Safety Administration (nhtsa.gov), matched as 2024 GMC SIERRA 2500. US-market vehicles only; data cached for up to 7 days.