“VERY NICE TRUCK OVER ALL. ONLY THING IS THAT MY WIFE SAYS THE PASSENGER SEAT IS TOO LOW”
2023 GMC Sierra 1500: What's New, Specs & Features
Last updated August 4, 2026
The biggest change for the 2023 GMC Sierra 1500 is its stronger second-generation 3.0L Duramax turbo-diesel, rated at 305 horsepower and 495 lb-ft of torque. This is otherwise a light-update year, with no redesign or broad styling and technology changes.
About the 2023 GMC Sierra 1500
4th generation (2019-2026), second model year after the 2022 mid-cycle exterior and interior update
GMC positions the Sierra 1500 as a full-size pickup that combines serious towing, hauling and work capability with a more upscale cabin and more specialized trims than a basic work truck. Its identity spans straightforward job-site models, off-road-focused AT4 versions and luxury-oriented Denali versions. Key model-level strengths are its broad gas-and-diesel engine range, useful MultiPro tailgate, large cargo bed and technology-rich upper trims.
The 2023 lineup ranges from the straightforward Pro work truck to the off-road AT4 and AT4X and the comfort-focused Denali models. SLE and higher trims feature a 13.4-inch touchscreen and 12.3-inch digital instrument cluster, while AT4 adds a 2-inch factory lift and trail hardware. The top Denali grade stands out with a composite cargo bed, massaging front seats, premium Bose audio and a head-up display.
What changed, by category
Powertrain
The second-generation 3.0L Duramax turbo-diesel produces 305 horsepower and 495 lb-ft of torque, up from 277 horsepower and 460 lb-ft in 2022. It is used in diesel-equipped SLE, Elevation, SLT, AT4 and both Denali grades.
Safety
The AT4 gains previously optional Sierra Safety Plus equipment as standard. Key additions include a surround-view camera, front and rear parking sensors, rear cross-traffic braking, rear pedestrian alert and trailer blind-zone monitoring.
2023 GMC Sierra 1500 specs and features by trim
| Feature | ||||||||
|---|---|---|---|---|---|---|---|---|
| Engine | 6-Cyl, Turbo Diesel, 3.0 Liter / V8, EcoTec3, DFM, 6.2 Liter | 4-Cyl, Turbo, 2.7 Liter / V8, EcoTec3, 5.3 Liter / V8, EcoTec3, DFM, 5.3 Liter / 4-Cyl, HO, Turbo, 2.7 Liter | 6-Cyl, Turbo Diesel, 3.0 Liter / V8, EcoTec3, DFM, 5.3 Liter / 4-Cyl, HO, Turbo, 2.7 Liter / 4-Cyl, Turbo, 2.7 Liter | 6-Cyl, Turbo Diesel, 3.0 Liter / V8, EcoTec3, DFM, 5.3 Liter / V8, EcoTec3, DFM, 6.2 Liter | V8, EcoTec3, DFM, 6.2 Liter | 6-Cyl, Turbo Diesel, 3.0 Liter / V8, EcoTec3, DFM, 5.3 Liter / V8, EcoTec3, DFM, 6.2 Liter | 6-Cyl, Turbo Diesel, 3.0 Liter / V8, EcoTec3, DFM, 5.3 Liter / 4-Cyl, HO, Turbo, 2.7 Liter / 4-Cyl, Turbo, 2.7 Liter | 6-Cyl, Turbo Diesel, 3.0 Liter / V8, EcoTec3, DFM, 6.2 Liter |
| Transmission | Automatic, 10-Spd w/Overdrive | Automatic, 8-Spd w/Overdrive / Automatic, 10-Spd w/Overdrive | Automatic, 10-Spd w/Overdrive / Automatic, 8-Spd w/Overdrive | Automatic, 10-Spd w/Overdrive | Automatic, 10-Spd w/Overdrive | Automatic, 10-Spd w/Overdrive | Automatic, 10-Spd w/Overdrive / Automatic, 8-Spd w/Overdrive | Automatic, 10-Spd w/Overdrive |
| Drivetrain | 4WD | 2WD / 4WD | 2WD / 4WD | 4WD / 2WD | 4WD | 2WD / 4WD | 4WD / 2WD | 4WD |
| Fuel Type | Diesel / Gas | Gas | Diesel / Gas | Diesel / Gas | Gas | Diesel / Gas | Diesel / Gas | Diesel / Gas |
| MPG City | 15–22 mpg | 16–19 mpg | 16–24 mpg | 15–24 mpg | 14 mpg | 15–24 mpg | 16–24 mpg | 15–22 mpg |
| MPG Highway | 19–27 mpg | 20–22 mpg | 20–30 mpg | 19–29 mpg | 17 mpg | 19–29 mpg | 20–30 mpg | 19–27 mpg |
| Horsepower | 277–420 hp | 310–355 hp | 277–355 hp | 277–420 hp | 420 hp | 277–420 hp | 277–355 hp | 277–420 hp |
| Torque | 460 lb-ft | 383–430 lb-ft | 383–460 lb-ft | 383–460 lb-ft | 460 lb-ft | 383–460 lb-ft | 383–460 lb-ft | 460 lb-ft |
| Max Towing | 8900 lb | 9000–9800 lb | 12900–13000 lb | 12900 lb | 8900 lb | 9400 lb | 12900–13000 lb | |
| Trunk/Cargo | 71.7 cu-ft | 71.7 cu-ft | 71.7 cu-ft | |||||
| Rear Legroom | 43.4 in | 35.2–43.4 in | 35.2–43.4 in | 43.4 in | 43.4 in | 43.4 in | 35.2–43.4 in | 43.4 in |
| Seats | 5 | 3–6 | 6 | 6 | 5 | 5 | 6 | 5 |
| Doors | 4 | 2–4 | 4 | 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 | ||||||||
| Auto-Dimming Exterior Mirrors | ||||||||
| Fog Lights | ||||||||
| LED Headlights | ||||||||
| Memory Exterior Mirrors | ||||||||
| Power Moonroof | ||||||||
| Power Folding Exterior Mirrors | ||||||||
| Privacy Glass | ||||||||
| Side Steps | ||||||||
| Tow Hooks | ||||||||
| Trailer Hitch Receiver | ||||||||
| Head-Up Display | ||||||||
| Navigation System | ||||||||
| Premium Audio | ||||||||
| Smartphone Interface | ||||||||
| Subwoofer | ||||||||
| Touch Screen Monitor | ||||||||
| USB Ports | ||||||||
| 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 | ||||||||
| Power Windows | ||||||||
| Push-Button Engine Start | ||||||||
| Remote Start | ||||||||
| Tilt Wheel | ||||||||
| Tilt/Telescoping Steering Wheel | ||||||||
| Ventilated Front Seats | ||||||||
Frequently asked questions
What is the biggest change to the 2023 GMC Sierra 1500?
The biggest change is the stronger second-generation 3.0L Duramax turbo-diesel. It produces 305 horsepower and 495 lb-ft of torque in diesel-equipped SLE, Elevation, SLT, AT4 and both Denali grades.
How much more powerful is the 2023 Sierra 1500 diesel than the 2022 diesel?
The 2023 diesel has 28 more horsepower and 35 lb-ft more torque than the 2022 version. Output rises from 277 to 305 horsepower and from 460 to 495 lb-ft of torque.
Was the 2023 GMC Sierra 1500 redesigned?
No, the 2023 GMC Sierra 1500 was not redesigned. It carries forward the exterior, cabin and display layout introduced by the major 2022 update.
What changed on the 2023 GMC Sierra 1500 AT4?
The 2023 AT4 makes several camera and driver-assistance features standard, including a surround-view camera, parking sensors and trailer blind-zone monitoring. Diesel-equipped AT4 trucks also receive the stronger 305-horsepower, 495-lb-ft Duramax engine.
Is the 2023 GMC Sierra 1500 meaningfully different from the 2022 model?
Only in a few areas. The 2023 is most meaningfully different for diesel shoppers because of its stronger engine, while the AT4 also gains standard camera and driver-assistance equipment; the truck's overall design and dashboard carry over from 2022.
2023 GMC Sierra 1500 Reviews
What owners are saying about the 2023 GMC Sierra 1500.
4.2
2023 GMC Sierra 1500
(506 reviews)
“Loved the truck since the first day I got it. Has not given me any problems since I've owned it. Would buy it again if I had the chance.”
“Ensure you have defrost units in your side mirrors. The functionality of the center console sucks.”
Sources
- media.gmc.com — Sierra / 2023 / 2023 GMC Sierra 1500
- gmc.com — Sierra Ld / Updated / GMTR23CT100 MY23 GMC SIERRALD MOBILE 032224 INTERACTIVE FINAL
- gmc.com — Sierra Ld Mcm / 01 Images / GMC New 2022 SierraLD CustomerOrderingGuide
- news.gmc.com — 2023 / Apr / 0405 Sierra
- media.gmc.com — Sierra / 2024 / 2024 GMC Sierra 1500
- media.gmc.com — Sierra Denali Ultimate / 2022 / 2022 GMC SIERRA AT4X DENALI ULTIMATE FAST FACTS