2026 GMC Sierra 1500 AT4

Engine Type: 3.0L Duramax Turbo-Diesel I6 std / 5.3L V8 or 6.2L V8 opt.*

Displacement: 2,996 cc / 5,328 cc / 6,162 cc*

Max Power: 305 hp (Diesel) / 355 hp (5.3L V8) / 420 hp (6.2L V8)*

Max Torque: 495 lb-ft (Diesel) / 383 lb-ft (5.3L) / 460 lb-ft (6.2L)*

No. of Cylinders: 6 or 8*

Valves Per Cylinder: 4*

Fuel Supply System: Common Rail DI (Diesel) / DFM (V8)*

Turbo Charger: ✅* (Diesel std) / ❌ (V8 opt.)

Transmission Type: Automatic*

Gearbox: 10-Speed Automatic*

Drive Type: 4WD std (Autotrac 2-speed transfer case)*

Cab Style: Crew Cab only*

Bed Length Options: Short Bed 5.8 ft / Standard Bed 6.6 ft*

Bed Length — This Config (ft/in): Short: 69.9 in / Standard: 79.4 in*

Bed Width — Floor Max (in): 71.4 in*

Bed Width — Between Wheelhouses (in): 50.6 in*

Bed Depth (in): 22.0 in*

Bed Material: High-Strength Steel (EZ-Lift & Lower tailgate)*

Payload Capacity: Up to 1,870 lbs / 848 kg*

Max Towing Capacity: Up to 13,300 lbs / 6,033 kg (Duramax std + Max Trailering)*

Towing Configuration: Conventional / 5th Wheel / Gooseneck opt.*

Tongue Weight Rating: Up to 1,330 lbs*

Integrated Trailer Brake Controller: ✅*

Trailer Sway Control: ✅* (standard all trims)

Tow/Haul Mode: ✅* (standard all trims)

Max Engine Options Available: 3.0L Duramax Diesel std / 5.3L V8 / 6.2L V8 opt.*

Additional Features — Truck Capability: EZ-Lift & Lower tailgate, CornerStep rear bumper, 12 fixed cargo tie-downs, spray-on bedliner std, GMC MultiPro Tailgate opt., 2-in factory lift, Rancho monotube shocks, underbody skid plates, automatic locking rear differential std, Autotrac 2-speed transfer case, 20-in wheels w/ AT tires std, Hill Descent Control std, In-Vehicle Trailering App, trailer side blind zone alert std, up to 14 camera views opt., 33-in MT tires opt.*

Fuel Type: Regular Unleaded*

MPG: 20 City / 26 Hwy / 23 Combined (Duramax Diesel 4WD)* / 15/20/17 (5.3L V8 4WD)*

Fuel Tank Capacity: 24.0 gal / 90.9 L std / 33.0 gal opt.*

Top Speed: N/A (not published)

Front Suspension: Independent SLA w/ Z71 Off-Road Package, Rancho Monotube Shocks, 2-in Lift*

Rear Suspension: Multi-Link, Leaf Spring w/ Rancho Monotube Shocks, Z71 Off-Road Tuning*

Shock Absorbers Type: Rancho Monotube (off-road)*

Steering Type: Rack-and-Pinion, Electric Power Assist*

Steering Column: Tilt & Telescoping*

Front Brake Type: Ventilated Disc*

Rear Brake Type: Ventilated Disc*

Braking (60-0 mph): N/A

0-60 mph (Tested): 7.0 sec (est. Diesel)*

Wheel Size: 20-in*

Wheel Type: 20-in Machined Alloy w/ Carbon Grey Metallic Accents (AT tires std)*

Length (ft/mm): ~18.9 ft / 5,764 mm (Crew Cab short bed)*

Width (ft/mm): 6.8 ft / 2,061 mm*

Height (ft/mm): 6.4 ft / 1,956 mm (w/ 2-in lift)*

Boot Space (litres): Short: 1,781 L / 62.9 cu ft / Std: 2,030 L / 71.7 cu ft*

Seating Capacity: 5*

Wheel Base (ft/mm): ~11.4 ft / 3,480 mm*

No. of Doors: 4*

Ground Clearance: 11.2 in / 284 mm (w/ 2-in lift)*

Power Steering: ✅*

Air Conditioner: ✅* (dual-zone automatic climate control)

Heater: ✅*

Adjustable Steering: ✅*

Height Adjustable Driver Seat: ✅* (10-way power w/ lumbar)

Automatic Climate Control: ✅*

Adaptive Cruise Control: ❌ (opt.)

Height Adjustable Front Seat Belts: ✅*

Rear AC Vents: ✅* (Double/Crew Cab)*

Cruise Control: ✅*

Parking Sensors: ❌ (opt.)

Keyless Entry: ✅*

Central Console Armrest: ✅*

Gear Shift Indicator: ✅*

Lane Change Indicator: ✅*

Follow Me Home Headlamps: ✅*

Additional Features - Comfort: Dual-zone auto climate, 10-way power driver seat w/ lumbar, heated front seats, perforated leather seating, Jet Black interior w/ Kalahari accents, 2-in factory lift, Rancho monotube shocks, Z71 off-road suspension, automatic locking rear differential, underbody skid plates, AT tires std, Hill Descent Control, wireless phone charging, Keyless Open & Start, 4G LTE Wi-Fi hotspot, automatic stop/start, GMC Pro Safety Plus std*

Tachometer: ✅* (13.4-in touchscreen / 12.3-in driver display)*

Leather Wrapped Steering Wheel: ✅* (heated leather)*

Glove Box: ✅* (dual lockable glove boxes)*

Additional Features - Interior: Perforated leather seating w/ Kalahari accents, 13.4-in Premium Infotainment w/ Google built-in, 12.3-in digital DIC, wireless CarPlay/Android Auto, USB ports, dual-zone auto climate, heated front seats, wireless charging, SiriusXM, off-road gauge display, terrain mode selector, AT4-exclusive Jet Black / Kalahari interior, Bose 7-speaker std, Bose 12-speaker opt., 15-in HUD opt., OnStar, full GMC Pro Safety Plus*

Upholstery: Perforated Leather-Appointed (Jet Black w/ Kalahari)*

Adjustable Headlamps: ❌

Rear Window Wiper: N/A (open pickup bed)*

Rear Window Washer: N/A (pickup truck)*

Rear Window Defogger: ✅* (rear cab window)*

Alloy Wheels: ✅* (20-in machined w/ Carbon Grey)*

Rear Spoiler: N/A (pickup truck)

Side Stepper: ❌ (opt.)*

Outside Rear View Mirror Turn Indicators: ✅*

Integrated Antenna: ✅*

Chrome Grille: ❌ (body-color w/ AT4 badging)*

Projector Headlamps: ✅* (LED)*

Fog Lights: ✅* (LED)*

Sunroof: ❌ (opt.)*

Boot Opening: EZ-Lift & Lower Tailgate / GMC MultiPro opt.*

Tyre Size: 275/55R20 (AT)*

Tyre Type: All-Terrain*

LED DRLs: ✅*

LED Headlamps: ✅*

LED Taillights: ✅*

Additional Features - Exterior: Body-color bumpers w/ AT4 badging, 20-in machined alloy wheels w/ Carbon Grey accents, AT tires std, 2-in factory lift, skid plate protection, LED headlamps, LED taillamps, LED fog lamps, power-folding heated mirrors, spray-on bedliner std, MultiPro Tailgate opt.*

ABS: ✅*

Central Locking: ✅*

Anti-Theft Alarm: ✅*

No. of Airbags: 6*

Driver Airbag: ✅*

Passenger Airbag: ✅*

Side Airbag: ✅*

Side Airbag-Rear: ✅* (side curtain all rows)*

Safety Rating: IIHS Top Safety Pick (current gen)*

Day & Night Rear View Mirror: ✅*

EBD: ✅*

Seat Belt Warning: ✅*

Door Ajar Warning: ✅*

Engine Immobilizer: ✅*

Speed Alert: ✅*

Speed Sensing Auto Door Lock: ✅*

Additional Features - Safety: GMC Pro Safety Plus std: FCA, AEB, Front Pedestrian Braking, Following Distance Indicator, Lane Keep Assist, IntelliBeam, rear vision camera, Rear Cross-Traffic Alert, Blind Zone Steering Assist, Lane Change Alert, Side Blind Zone Alert, Hill Descent Control std, automatic locking rear diff, trailer side blind zone alert std, rear park assist opt., 15-in HUD opt., Teen Driver, OnStar Emergency SOS*

Radio: AM/FM/HD Radio, SiriusXM trial*

Infotainment Screen Size: 13.4-inch*

Touchscreen: ✅*

Touchscreen Size: 13.4-inch*

USB Ports: 4x USB*

Tweeters: ✅* (Bose 7-speaker std)*

Speakers: Bose 7 std / Bose 12 opt.*

Additional Features - Entertainment: 13.4-in Premium GMC Infotainment w/ Google built-in, 12.3-in digital DIC, wireless Apple CarPlay, wireless Android Auto, Bluetooth, AM/FM/HD/SiriusXM trial, 4x USB, 4G LTE Wi-Fi hotspot, Bose 7-speaker std / Bose 12-speaker opt., off-road app display, In-Vehicle Trailering App, 15-in HUD opt., OnStar, myGMC app*

Max Towing Capacity: Up to 13,300 lbs / 6,033 kg (Duramax std + Max Trailering pkg)*

Ground Clearance: 11.2 in / 284 mm (w/ 2-in lift)*