The 2024 GMC Sierra 2500HD receives updated front-end styling, improved interior designs on most trims, improved technology, updated powertrains, and two additional trims that bring the top-tier Denali Ultimate and an off-road-minded AT4X which will debut later in 2023.
Choosing Your GMC Sierra 2500HD
The 2024 GMC Sierra 2500HD is offered in six trims, the Pro, SLE, SLT, AT4, Denali, and Denali Ultimate with base prices that range from $46,295 to $93,795 with widely varying levels of equipment and capability.
The 2024 Sierra offers one large gasoline engine and one large diesel engine.
The 6.6-liter gas V8 produces 401 horsepower and 464 pound-feet of torque and is now mated to the same 10-speed Allison-brand transmission that is used with the diesel engine. The revised 6.6-liter turbo-diesel V8 “Duramax” now produces 470 horsepower and 965 pound-feet of torque at 1,600 RPM and is hooked to a 10-speed automatic transmission. Its $9,490 price tag is significant, however, it also includes a host of chassis and electrical upgrades for harder-working situations.
Rear-wheel drive is standard and a four-wheel-drive system with low range is offered for $2,800 that features an automatic setting on the SLT and up trims.
Due to the expected varying use of the heavy-duty pick-up truck, the EPA has not rated this vehicle.
Passenger and Cargo Capacity
The GMC Sierra 2500HD’s two base trims are available in a regular cab and an extended cab form that features four forward-hinged doors and offers 35.2 inches of rear legroom. The crew cab with four full-size doors is standard on most trims and brings a spacious 43.4 inches of rear legroom. The long bed, about eight-feet long, is available for $200 and the standard bed is about 6.75-feet in length. The overall size of one of its most popular configurations, the crew cab with the shorter bed, is about 250 inches in length and nearly 82 inches wide which is slightly wider but equally as long as a comparable F-250.
The towing ratings vary on the body and drivetrain configurations. The ball hitch towing capacity for the crew cab with the standard bed (and towing package) is 20,000 pounds when fitted with the diesel and 16,000 pounds with the gas engine. The 5th wheel or gooseneck hitch style allows for increased capacity of 21,600 on most trims with the diesel. The new Ultimate trim doesn’t quite reach those figures (19,300 pounds max) and the available mud-terrain tires can significantly reduce the capacity. If you’re looking to max out your three-quarter-ton truck, the regular cab long bed two-wheel drive model can pull 22,500 pounds, the most for the 2500HD.
The 2500HD is equipped with features such as a forward-distance indicator, automatic emergency braking with pedestrian detection, an HD rearview camera, and automatic headlights. The Pro Safety Plus Package is available for $1,305 and adds rear parking sensors, rear cross-traffic alert, and blind spot detection to the base trim while adaptive cruise control is offered through the $1,415 Preferred Package (on premium trims) which also includes automated safety inspections of the trailer. The SLT offers the HD Pro Safety Plus Package for $1,395 and it includes surround view cameras, trailer blind-spot detection, a bed view camera, and front parking sensors.
An eight-inch touchscreen display is standard on the base trim along with Apple CarPlay, Android Auto, a wi-fi hotspot, and two USB ports. The SLE receives a landscape 13.4-inch touchscreen with Google built-in and SiriusXM and offers additional power ports for the rear passengers.
The Pro trim receives 17-inch steel wheels, animated LED front lighting (including the headlights, turn signals, and daytime running lights), LED tail lights (but with incandescent brake lights), the Trailering Package, an automatic locking rear differential, extendable heated mirrors with lower convex glass and integrated turn signals, a capless fuel filler, chrome front and rear bumpers, a locking tailgate, recovery hooks, brake pad wear indicators, and power windows and door locks. The cabin's design is a carryover from last year, unlike the other Sierra 2500HD trims.
The SLE trim gains an updated interior with a 12.3-inch digital gauge cluster, redesigned 17-inch alloy wheels, a power locking “Multi-pro” tailgate with an integrated step and assisted lifting, and proximity entry. The SLE Convenience Package is offered for $1,140 and includes a 10-way power driver’s seat, dual-zone automatic climate control, a 120-volt power outlet in the bed and in the center console, and LED fog lights. Heated seats are another $400.
The SLT trim is additionally equipped with 18-inch alloy wheels, LED brake lights and cargo lights, remote start, additional trailering apps and hitch view camera, a variable steering ratio, 10-way power front seats with perforated leather and memory position for the driver, and heated front seats and steering wheel. The SLT Convenience Package is $1,525 and adds ventilated front seats, a power sliding rear window, wireless charging, and a Bose sound system.
The off-road minded Sierra is four-wheel-drive only and includes an off-road suspension, additional underbody protections, red tow hooks, downhill assist, 20-inch wheels with all-terrain tires, high-gloss mirror caps, body-color front and rear bumpers, black window moldings, and the features of the SLT Convenience Package.
The interior gains unique leather seat inserts and trim design and the available $1,275 Technology Package brings a digital rearview camera mirror and a head-up display.
The Denali features 20-inch machined bright wheels, chrome vertical tow hooks, side steps, chrome door handles and mirror caps, a polished exhaust tip, smoked amber LED roof clearance lights, unique interior trim and colors, and a surround-view camera. Optional packages include the Denali Illumination Package for $950 which features an illuminated grille emblem and puddle lamps and the Denali Reserve Package ($2,270) which includes the features of the AT4’s Technology Package along with adaptive cruise control.
The new top-tier trim is equipped with the diesel powertrain, a unique grille with dark chrome accents, unique 20-inch wheels, a sunroof, power assist steps with LED lighting, the features of the Technology Package, full grain leather seats, and an upgraded sound system.
The SLT trim is a significant step up in price over the SLE but it features a level of luxury that is fitting for the GMC brand.