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2024 GMC Sierra 2500HD Denali Ultimate

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 TypePickup
PowertrainGas
Price
MSRP$92,900
MSRP with Destination$94,895
Destination Charge$1,995
Engine
Engine Type6.6L V-8 gasoline / E85 FlexFuel; cast iron block with nodular iron main caps; cast aluminum heads
Displacement6.6 L
Horsepower401 hp
Torque464 lb-ft
ValvetrainOverhead-valve, 2 valves per cylinder, variable valve timing
Bore and Stroke103.25 x 98
Compression Ratio10.8:1
Injection TypeDirect fuel injection
Drivetrain
Drive Type4WD
Transmission
TransmissionAllison 10L1000 10-Speed Automatic
1st Gear4.54
2nd Gear2.87
3rd Gear2.06
4th Gear1.72
5th Gear1.48
6th Gear1.26
7th Gear1
8th Gear0.85
9th Gear0.69
10th Gear0.63
Reverse4.54
Final Drive3.73
Fuel Economy
Recommended FuelRegular Unleaded / E85 FlexFuel
Suspension
Front SuspensionIndependent front suspension with torsion bars; 1.5-in factory-installed lift
Rear SuspensionSemi-elliptic, two-stage, multi-leaf springs; 1.5-in factory-installed lift; Multimatic DSSV dampers
Brakes
Front Brake Disc14.0 x 1.6 in / 355 x 40 mm ventilated disc
Rear Brake Disc14.1 x 1.3 in / 360 x 34 mm ventilated disc
Tires & Wheels
Wheels Front18 x 9 in aluminum
Wheels Rear18 x 9 in aluminum
Tires FrontLT305/70R18 MT
Tires RearLT305/70R18 MT
Dimensions & Weight
Length250.7 in
Width81.9 in
Height82.6 in
Wheelbase159.1 in
Front Track69.3 in
Rear Track70 in
Ground Clearance11.6 in
Approach Angle31.6°
Departure Angle25.7°
Curb Weight7,516 lbs
Interior
Headroom Front43.03 in
Headroom Rear40.12 in
Legroom Front44.53 in
Legroom Rear43.4 in
Shoulder Room Front66.02 in
Shoulder Room Rear65.3 in
Hip Room Front61.18 in
Hip Room Rear60.24 in

Safety & Recalls

NCAP safety ratings

Overall Not rated
Frontal crash ★★★★★
Side crash ★★★★★
Rollover Not rated
Tested variant: 2024 GMC Sierra 2500 PU/CC 4WD
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

Most-cited areas
Engine1
A complaint can cite more than one area.
Most recent complaints
Nov 25, 2024 · Engine Fire
“The contact owned a 2024 GMC Sierra 2500 HD. The contact stated that after parking the vehicle at night and plugging in the engine block heater to a standard 110-Volt outlet with an extension cord…”

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.

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