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2023 GMC Sierra 3500: What's New, Specs & Features
Last updated August 13, 2026
The 2023 GMC Sierra 3500 is a light equipment-update year, not a redesign. The main change is that a touchscreen became standard on AT4 and SLT, while SLT also gained standard heated front seats.
About the 2023 GMC Sierra 3500
Current Sierra HD generation introduced for 2020; 2023 is its final pre-refresh year before the major 2024 update.
GMC positions the Sierra 3500 as a heavy-duty pickup for people who need serious towing and payload capability but still want a more upscale feel than a basic work truck. The model’s core identity is strong hauling and trailering confidence, with GMC separating itself through features like the MultiPro tailgate, available advanced trailer-camera tools, and premium trim progression from straightforward work use to off-road AT4 and luxury Denali.
The Pro remains the work-focused truck, while SLE and SLT layer in more trailer-management tools and convenience features. AT4 pairs heavy-duty capability with Rancho shocks and skid plates, while Denali emphasizes comfort with leather seating, open-pore wood trim, built-in navigation and surround-view trailer cameras.
What changed, by category
Tech and cabin equipment
A touchscreen changed from optional to standard on AT4 and SLT. Heated front seats also changed from optional to standard on SLT.
2023 GMC Sierra 3500 specs and features by trim
| Feature | |||||
|---|---|---|---|---|---|
| Engine | V8, Turbo Diesel, 6.6 Liter / V8, 6.6 Liter | V8, Turbo Diesel, 6.6 Liter / V8, 6.6 Liter | V8, Turbo Diesel, 6.6 Liter / V8, 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, 6-Spd HD | Automatic, 6-Spd HD | Automatic, 6-Spd HD | Automatic, 10-Spd Allison | Automatic, 6-Spd HD |
| Drivetrain | 4WD | 4WD | 4WD | 4WD | 4WD |
| Fuel Type | Diesel / Gas | Diesel / Gas | Diesel / Gas | 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 | 20000 lb | 14500–20000 lb | 14500–20000 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 |
| 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 | |||||
| Tow Hooks | |||||
| 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 3500 compared with the 2022 model?
The 2023 Sierra 3500 received only minor equipment changes. A touchscreen became standard on AT4 and SLT, and SLT gained standard heated front seats; the engines, styling and basic lineup carried over.
Was the 2023 GMC Sierra 3500 redesigned?
No, the 2023 Sierra 3500 was not redesigned. It is the final model year before the more extensive 2024 refresh, which brought a revised front end, a new interior, more standard safety equipment and powertrain updates.
Did the 2023 GMC Sierra 3500 get new engines?
No, the 2023 Sierra 3500 kept the 6.6-liter gas V8 and 6.6-liter Duramax diesel used for 2022. There was no major lineup-wide powertrain change for this model year.
How is the 2023 Sierra 3500 AT4 different from the Denali?
The 2023 AT4 has the more off-road-oriented setup, including Rancho shocks, skid plates and a two-speed transfer case. Denali focuses on upscale comfort with leather seating, open-pore wood trim, built-in navigation and surround-view trailer cameras.
Is the 2023 GMC Sierra 3500 meaningfully different from the 2022 model?
No, the differences are small. The 2023 model mainly changes which cabin features are standard on AT4 and SLT, without a new design, new engine lineup or major chassis update.
2023 GMC Sierra 3500 Reviews
What owners are saying about the 2023 GMC Sierra 3500.
4.2
2023 GMC Sierra 3500
(122 reviews)
“Great truck, gas mileage I thought would've been better. Has lots of power and comfortable to drive”
“It does what it was designed to do. Reliable, tow vehicle for long distances in comfort and style.”