“I am very disappointed the cargo camera plug cannot be accessed in the bed like the 7 way plug for use with a gooseneck horse trailer. The camera cable has to loop over the tailgate and plug into the bumper outlet. This is a trailer towing truck. Someone wasn't thinking or doesn't understand gooseneck horse trailers and their popularity.”
2024 GMC Sierra 2500: What's New, Specs & Features
Last updated August 4, 2026
The biggest change for the 2024 GMC Sierra 2500 HD is a broad mid-cycle refresh rather than a full redesign. It brings upgraded powertrains, revised styling and interiors, more standard safety equipment and larger screens on SLE and higher trims.
About the 2024 GMC Sierra 2500
4th generation, introduced for 2020; mid-cycle refresh year
The Sierra 2500 HD is GMC’s heavy-duty pickup for substantial towing, hauling and work, positioned with more premium cabin design and technology than its Chevrolet sibling. Its identity combines 6.6L V8 power, integrated trailering hardware, useful bed access and a wide trim range—from straightforward work configurations to off-road-focused and luxury models. It suits owners who need genuine heavy-duty capability but also value comfort, cameras and towing-focused controls.
The 2024 range stretches from the straightforward Pro work truck to the off-road-focused AT4 and new AT4X, which has a 1.5-inch lift, specialized shocks and a locking rear differential. Denali emphasizes leather, wood trim and camera technology, while a new luxury-focused Denali variant adds standard diesel power, massaging front seats, a head-up display and a camera-based rearview mirror.
What changed, by category
Powertrain
The gasoline 6.6-liter V8 switches from a six-speed automatic to an Allison 10-speed automatic. The 6.6-liter turbo-diesel V8 increases from 445 to 470 horsepower and from 910 to 975 lb-ft of torque.
Styling
The front end receives revised grille and bumper designs plus animated LED projector lighting. Most trims also get redesigned interiors.
Safety
The Sierra HD Pro Safety suite becomes standard across the range and adds Front Pedestrian Braking. Automatic emergency braking and lane-departure warning also move from optional to standard on Pro, SLE, SLT and AT4.
Technology
A 13.4-inch touchscreen and 12.3-inch digital instrument cluster become standard on SLE and higher trims. Navigation and premium audio become standard on AT4 and SLT, while AT4 also gains a standard surround-view camera.
Trim lineup
The off-road-focused AT4X and a new luxury-focused Denali variant join the range.
Cabin equipment
A tilt-adjustable steering wheel changes from standard to optional on Pro and SLE.
2024 GMC Sierra 2500 specs and features by trim
| Feature | |||||||
|---|---|---|---|---|---|---|---|
| Engine | V8, Turbo Diesel, 6.6 Liter / V8, 6.6 Liter | V8, 6.6 Liter / V8, Turbo Diesel, 6.6 Liter | V8, Turbo Diesel, 6.6 Liter / V8, 6.6 Liter | V8, Turbo Diesel, 6.6 Liter / V8, 6.6 Liter | V8, 6.6 Liter / V8, Turbo Diesel, 6.6 Liter | V8, Turbo Diesel, 6.6 Liter / V8, 6.6 Liter | V8, Turbo Diesel, 6.6 Liter |
| Transmission | Automatic, 10-Spd Allison | Automatic, 10-Spd Allison | Automatic, 10-Spd Allison | Automatic, 10-Spd Allison | Automatic, 10-Spd Allison | Automatic, 10-Spd Allison | Automatic, 10-Spd Allison |
| Drivetrain | 4WD | 4WD | 4WD | 4WD | 4WD | 4WD | 4WD |
| Fuel Type | Diesel / Gas | Gas / Diesel | Diesel / Gas | Diesel / Gas | Gas / Diesel | Diesel / Gas | Diesel |
| Horsepower | 401–470 hp | 401–470 hp | 401–470 hp | 401–470 hp | 401–470 hp | 401–470 hp | 470 hp |
| Torque | 464–975 lb-ft | 464–975 lb-ft | 464–975 lb-ft | 464–975 lb-ft | 464–975 lb-ft | 464–975 lb-ft | 975 lb-ft |
| Max Towing | 20800–21190 lb | 17600–22050 lb | 17600–22050 lb | 21510–21600 lb | 18500 lb | 20000 lb | 20000 lb |
| Rear Legroom | 43.4 in | 35.2–43.4 in | 35.2–43.4 in | 43.4 in | 43.4 in | 43.4 in | 43.4 in |
| Seats | 5 | 3–6 | 3–6 | 6 | 5 | 5 | 5 |
| Doors | 4 | 2–4 | 2–4 | 4 | 4 | 4 | 4 |
| Adaptive Cruise Control | |||||||
| Alarm System | |||||||
| Automatic Emergency Braking | |||||||
| Automatic High Beams | |||||||
| Blindspot Sensors | |||||||
| Cruise Control | |||||||
| Hill Descent Control | |||||||
| Lane Departure Warning | |||||||
| Park Assist | |||||||
| Rain Sensing Windshield Wipers | |||||||
| Rear View Camera | |||||||
| 360 Camera | |||||||
| Alloy Wheels | |||||||
| Fog Lights | |||||||
| Heated Mirrors | |||||||
| LED Headlights | |||||||
| Memory Exterior Mirrors | |||||||
| Power Moonroof | |||||||
| Power Folding Exterior Mirrors | |||||||
| Power Mirrors | |||||||
| Power Side Steps | |||||||
| Privacy Glass | |||||||
| Side Steps | |||||||
| Head-Up Display | |||||||
| Navigation System | |||||||
| Premium Audio | |||||||
| SD Card Slot | |||||||
| Satellite Radio | |||||||
| Smartphone Interface | |||||||
| Subwoofer | |||||||
| Touch Screen Monitor | |||||||
| Auto-Dimming Interior Mirror | |||||||
| Dual Power Front Seats | |||||||
| Dual-Zone Climate Control | |||||||
| Heated Front Seats | |||||||
| Heated Rear Seats | |||||||
| Heated Steering Wheel | |||||||
| Integrated Garage Door Opener | |||||||
| Leather Seats | |||||||
| Leather-Wrapped Steering Wheel | |||||||
| Massage Front Seat | |||||||
| Memory Driver's Seat | |||||||
| Power Driver Seat | |||||||
| Push-Button Engine Start | |||||||
| Remote Start | |||||||
| Tilt/Telescoping Steering Wheel | |||||||
| Ventilated Front Seats | |||||||
Frequently asked questions
Is the 2024 GMC Sierra 2500 a major update over the 2023 model?
Yes. The 2024 GMC Sierra 2500 receives a substantial mid-cycle update with revised styling and interiors, upgraded powertrains, larger digital displays, broader standard safety equipment and two new trims.
What changed under the hood for the 2024 GMC Sierra 2500?
The gasoline 6.6-liter V8 gains a 10-speed automatic in place of the previous six-speed, while the 6.6-liter turbo-diesel V8 rises to 470 horsepower and 975 lb-ft of torque.
Which trims joined the 2024 GMC Sierra 2500 range?
Two trims join the range for 2024: the trail-focused AT4X and a luxury-focused Denali variant with standard diesel power, massaging front seats and additional cabin technology.
What makes the 2024 GMC Sierra 2500 AT4X different?
The new AT4X is the range's most trail-focused trim. It has a 1.5-inch suspension lift, specialized Multimatic shocks, a driver-selectable locking rear differential, stronger skid plates and a premium cabin with massaging front seats.
Does every 2024 GMC Sierra 2500 have the larger digital displays?
No. The 13.4-inch touchscreen and 12.3-inch digital instrument cluster are standard on SLE and every higher trim. The Pro work truck is excluded from this standard-equipment upgrade.
2024 GMC Sierra 2500 Reviews
What owners are saying about the 2024 GMC Sierra 2500.
4.1
2024 GMC Sierra 2500
(217 reviews)
“Love my pickup. Love Black color but would have preferred Silver. Drives good, pulls a trailer good and I enjoy owning it except washing it often because black shows dirt!”
“The infotainment connection to phones is horrible in this car. It drops connection to the phone every 3 to 4 minutes and reconnects mid call. Had the same issue on multiple phones. Screen freezes up and has to be reset 1 in 15 drives.”