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2023 GMC Sierra 2500: What's New, Specs & Features
Last updated August 13, 2026
The 2023 GMC Sierra 2500 HD is mostly a carryover, with the main change limited to AT4 equipment. Heated and ventilated front seats and a heated steering wheel became standard on AT4, while satellite radio changed from standard to optional.
About the 2023 GMC Sierra 2500
Current Sierra HD generation introduced for 2020; 2023 is a late-cycle year and the last model year before the major 2024 refresh.
GMC positions the Sierra 2500 HD as a heavy-duty pickup that blends serious towing and hauling strength with a more upscale look and feel than many traditional work trucks. Across the range, the model’s core identity centers on trailering confidence, available diesel pulling power, the MultiPro tailgate on most trims, and a broad trim ladder that stretches from jobsite-focused Pro models to off-road AT4 and luxury Denali versions.
The 2023 lineup ranges from the work-focused Pro to the more polished Denali, with SLE and SLT filling the middle. AT4 pairs standard four-wheel drive with an off-road suspension, skid plates and added cabin comfort. Denali emphasizes everyday refinement with surround-view cameras, built-in navigation, Bose audio and wireless phone charging.
What changed, by category
Tech
AT4 received revised cabin equipment. Heated front seats, ventilated front seats and a heated steering wheel changed from optional to standard, while satellite radio changed from standard to optional.
2023 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, 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 |
| Transmission | Automatic, 10-Spd Allison | Automatic, 6-Spd HD | Automatic, 6-Spd HD | Automatic, 6-Spd HD | Automatic, 10-Spd Allison |
| Drivetrain | 4WD | 4WD | 4WD | 4WD | 4WD |
| Fuel Type | Diesel / Gas | Gas / Diesel | Gas / Diesel | Diesel / Gas | Diesel / Gas |
| Horsepower | 401–445 hp | 401–445 hp | 401–445 hp | 401–445 hp | 401–445 hp |
| Torque | 464–910 lb-ft | 464–910 lb-ft | 464–910 lb-ft | 464–910 lb-ft | 464–910 lb-ft |
| Max Towing | 18500 lb | 14500–18500 lb | 14500–18500 lb | 14500–18500 lb | 18500 lb |
| Rear Legroom | 43.4 in | 35.2–43.4 in | 35.2–43.4 in | 35.2–43.4 in | 43.4 in |
| Seats | 5 | 3–6 | 3–6 | 6 | 5 |
| Doors | 4 | 2–4 | 2–4 | 4 | 4 |
| Alarm System | |||||
| Automatic Emergency Braking | |||||
| Automatic High Beams | |||||
| Blindspot Sensors | |||||
| Cruise Control | |||||
| Hill Descent Control | |||||
| Lane Departure Warning | |||||
| Park Assist | |||||
| Rear View Camera | |||||
| 360 Camera | |||||
| Alloy Wheels | |||||
| Fog Lights | |||||
| HID Headlights | |||||
| 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 | |||||
| Memory Driver's Seat | |||||
| Power Driver Seat | |||||
| Remote Start | |||||
| Remote Keyless Entry | |||||
| Tilt Wheel | |||||
| Tilt/Telescoping Steering Wheel | |||||
| Ventilated Front Seats | |||||
Frequently asked questions
What changed on the 2023 GMC Sierra 2500 HD compared with 2022?
The main change was revised AT4 equipment. Heated and ventilated front seats and a heated steering wheel became standard, while satellite radio changed from standard to optional; the broader lineup otherwise carried over.
Was the 2023 GMC Sierra 2500 HD redesigned?
No, the 2023 Sierra 2500 HD was not redesigned. It retained the same basic exterior, cabin layout and mechanical foundation, making it the final model year before the larger 2024 refresh.
Did the 2023 GMC Sierra 2500 HD get new engines?
No, the engine lineup carried over for 2023. It retained the 6.6-liter gas V8 and the 6.6-liter Duramax diesel, with the diesel paired to a 10-speed automatic transmission.
What became standard on the 2023 Sierra 2500 AT4?
Heated front seats, ventilated front seats and a heated steering wheel became standard on the 2023 Sierra 2500 AT4. Its off-road equipment also includes standard four-wheel drive, Rancho shocks, Hill Descent Control and skid plates.
Did the 2023 GMC Sierra 2500 HD get a new infotainment system?
No, the 2023 Sierra 2500 HD did not receive a major screen or infotainment update. Apple CarPlay and Android Auto remained part of the lineup, while Denali retained built-in navigation, Bose audio and wireless phone charging.
2023 GMC Sierra 2500 Reviews
What owners are saying about the 2023 GMC Sierra 2500.
4.2
2023 GMC Sierra 2500
(122 reviews)
“It has good power. It is comfortable and quiet. It has the capability to do anything that you buy a truck to do.”
“This is a great truck with plenty of comfort and convenience options and the ability to get any job done.”