2026 GMC Sierra 1500: What's New, Specs & Features
Last updated August 4, 2026
The main 2026 GMC Sierra 1500 change is that premium audio becomes standard on AT4 and Denali. The AT4-X name also changes to AT4X, but the rest of the truck is largely unchanged for this final year before the 2027 redesign.
About the 2026 GMC Sierra 1500
4th generation (2019-2026), final year before the 2027 redesign
GMC positions the Sierra 1500 as a premium full-size pickup that combines real towing and hauling capability with more upscale cabin materials, technology, and specialized off-road and luxury trims than a basic work truck. Its identity spans job-site use, family travel, trailer duty, and trail driving, with a large cargo bed, roomy crew cab, broad powertrain range, distinctive styling, and high trims that approach luxury-vehicle comfort.
The eight-trim lineup runs from the work-focused Pro to a high-end Denali model focused on comfort and technology. AT4 and AT4X emphasize off-road hardware, while the top Denali trim stands out with full-grain leather, massaging front seats, a 12-speaker Bose audio system, and Super Cruise hands-free driver-assistance hardware.
What changed, by category
2026 GMC Sierra 1500 specs and features by trim
| Feature | ||||||||
|---|---|---|---|---|---|---|---|---|
| Engine | 6-Cyl, Turbo Diesel, 3.0 Liter / V8, EcoTec3, DFM, 6.2 Liter | V8, EcoTec3, 5.3 Liter / 4-Cyl, TurboMax, 2.7 Liter / V8, EcoTec3, DFM, 5.3 Liter | V8, EcoTec3, DFM, 5.3 Liter / 4-Cyl, TurboMax, 2.7 Liter / 6-Cyl, Turbo Diesel, 3.0 Liter | V8, EcoTec3, DFM, 5.3 Liter / 6-Cyl, Turbo Diesel, 3.0 Liter / V8, EcoTec3, DFM, 6.2 Liter | 6-Cyl, Turbo Diesel, 3.0 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 | 4-Cyl, TurboMax, 2.7 Liter / 6-Cyl, Turbo Diesel, 3.0 Liter / V8, EcoTec3, DFM, 5.3 Liter | 6-Cyl, Turbo Diesel, 3.0 Liter / V8, EcoTec3, DFM, 6.2 Liter |
| Transmission | Automatic, 10-Spd w/Overdrive & Range Selector (MQC) / Automatic, 10-Spd w/Overdrive & Range Selector (MHS) | Automatic, 10-Spd w/Overdrive / Automatic, 8-Spd w/Overdrive / Automatic, 10-Spd w/Overdrive (MHT) | Automatic, 10-Spd w/Overdrive (MHT) / Automatic, 8-Spd w/Overdrive / Automatic, 10-Spd w/Overdrive (MQB) | Automatic, 10-Spd w/Overdrive (MHT) / Automatic, 10-Spd w/Overdrive (MQB) / Automatic, 10-Spd w/Overdrive & Range Selector (MHS) / Automatic, 10-Spd w/Overdrive & Range Selector (MQC) | Automatic, 10-Spd w/Overdrive & Range Selector (MQC) / Automatic, 10-Spd w/Overdrive & Range Selector (MHS) | Automatic, 10-Spd w/Overdrive & Range Selector (MQC) / Automatic, 10-Spd w/Overdrive & Range Selector (MHS) | Automatic, 8-Spd w/Overdrive / Automatic, 10-Spd w/Overdrive & Range Selector (MQC) / Automatic, 10-Spd w/Overdrive (MHT) / Automatic, 10-Spd w/Overdrive (MQB) | Automatic, 10-Spd w/Overdrive & Range Selector (MQC) / Automatic, 10-Spd w/Overdrive & Range Selector (MHS) |
| Drivetrain | 4WD | 2WD / 4WD | 2WD / 4WD | 4WD / 2WD | 4WD | 2WD / 4WD | 4WD / 2WD | 4WD |
| Fuel Type | Diesel / Gas | Gas | Gas / Diesel | Gas / Diesel | Diesel / Gas | Diesel / Gas | Gas / Diesel | Diesel / Gas |
| MPG City | 14–19 mpg | 15–18 mpg | 15–22 mpg | 14–23 mpg | 14–19 mpg | 14–23 mpg | 15–23 mpg | 14–19 mpg |
| MPG Highway | 16–20 mpg | 19–21 mpg | 18–26 mpg | 16–28 mpg | 16–20 mpg | 16–28 mpg | 18–28 mpg | 16–20 mpg |
| Horsepower | 305–420 hp | 310–355 hp | 305–355 hp | 305–420 hp | 305–420 hp | 305–420 hp | 305–355 hp | 305–420 hp |
| Torque | 460–495 lb-ft | 383–430 lb-ft | 383–495 lb-ft | 383–495 lb-ft | 460–495 lb-ft | 383–495 lb-ft | 383–495 lb-ft | 460–495 lb-ft |
| Max Towing | 13000–13100 lb | 9000–11000 lb | 11000–13100 lb | 13000–13100 lb | 13100 lb | 13100 lb | 13000–13100 lb | 13100 lb |
| Trunk/Cargo | 62.9–71.7 cu-ft | 62.9–71.7 cu-ft | 62.9–71.7 cu-ft | 62.9–71.7 cu-ft | 62.9 cu-ft | 62.9–71.7 cu-ft | 62.9–71.7 cu-ft | 62.9 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 | ||||||||
| 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 | ||||||||
| Memory Exterior Mirrors | ||||||||
| Power Moonroof | ||||||||
| Power Folding Exterior Mirrors | ||||||||
| Side Steps | ||||||||
| Tow Hooks | ||||||||
| Trailer Hitch Receiver | ||||||||
| Head-Up Display | ||||||||
| Navigation System | ||||||||
| Premium Audio | ||||||||
| 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 Wheel | ||||||||
| Tilt/Telescoping Steering Wheel | ||||||||
| Ventilated Front Seats | ||||||||
Frequently asked questions
Is the 2026 GMC Sierra 1500 redesigned?
No. The 2026 Sierra 1500 is the final year of the fourth generation, and its basic design, powertrain range, safety equipment, and display hardware carry over ahead of the fully redesigned 2027 model.
What is the biggest change to the 2026 GMC Sierra 1500?
The biggest change is standard premium audio on the AT4 and Denali trims. It was optional on those trims for 2025.
Did GMC discontinue the Sierra 1500 AT4-X for 2026?
No. The AT4-X continues under the AT4X name for 2026; this is a rename rather than a discontinued trim or a new replacement model.
Did the 2026 Sierra 1500 get new engines or transmissions?
No. The established TurboMax four-cylinder, 5.3-liter V8, 6.2-liter V8, and 3.0-liter diesel engine families return with trim-dependent eight- or 10-speed automatic transmissions.
Is the 2026 Sierra 1500 meaningfully different from the 2025 model?
No, not for most shoppers. Aside from standard premium audio on AT4 and Denali and the AT4X naming update, the major powertrains, styling, safety systems, structure, and displays carry over.