2021 GMC Sierra Accessories & Parts
2021 GMC Sierra Parts
Brakes- Suspension
- Exhaust
- Driveline & Axles
- Engine Cooling
- A/C & Heating
- Air Intake
- Engine
- Steering
- Fuel Delivery
- Transmission
- Starting & Charging
- Emission Control
- Ignition
- Electrical
- Wipers & Washers
- Turbo & Superchargers
- Performance Chips
- Oils, Fluids, Lubricants
- Power Adders
- Racing Gear
- Repair Manuals
2021 GMC Sierra Wheels & Tires
2021 GMC Sierra Exterior Accessories
- Running Boards
- Off-Road Bumpers
- Custom Hoods
- Towing & Hitches
- Body Kits
- Mirrors
- Grille Guards
- Bed Accessories
- Chrome Trim
- Bug Deflectors
- Spoilers
- Commercial Van Equipment
- Custom Grilles
- Tonneau Covers
- Wind Deflectors
- Fender Flares
- Roof Racks
- Winches
- Car Covers
- Car Bras
- Bike Racks
- Light Covers
- Wiper Blades
- Mud Flaps
- License Plates & Frames
- Armor & Protection
- Car Wraps
- Emblems & Logos
- Sunroof Visors
- Spare Tire Covers & Carriers
- Custom Horns
- Car Tents
- Snow Plows
- Auto Detailing
2021 GMC Sierra Automotive Lighting
2021 GMC Sierra Body Parts
2021 GMC Sierra Interior Accessories
2021 GMC Sierra Maintenance
2021 GMC Sierra Audio & Electronics
2021 GMC Sierra Automotive Tools
- Diagnostic & Testing Tools
- Engine Service Tools
- Pullers & Installers
- Suspension & Steering Service Tools
- Oil Change Tools
- A/C Tools & Equipment
- Spark Plug & Ignition Tools
- Cooling System Service Tools
- Automotive Lifts & Stands
- Fuel System Service
- Wheel & Tire Service Tools
- Jacks
- Brake Service Tools
- Lockout Kits
- Exhaust System Service Tools
- Auto Glass Tools
- Electrical System Tools
- Transmission & Drivetrain Service Tools
- EV Charging
- Automotive Paint
- Repair Manuals
- Battery Chargers & Jump Starters
- Creepers
- Key Cutting Machines
- Dollies & Movers
- Auto Detailing
- Dent Repair Tools
- Service Carts
- Vehicle & Parts Protection
2021 GMC Sierra Specifications
| Model | 1500 | 2500 HD | 3500 HD | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Submodel | Elevation / SLE | Elevation / SLE / SLT / AT4 / Denali | Base | Base / SLE / SLT Elevation / AT4 / Denali |
SLT / AT4 / Denali | Base / SLE / SLT / AT4 / Denali | Base / SLE / SLT / AT4 / Denali | ||
| Body Type | 2-door Regular Cab 4-door Double Сab 4-door Crew Сab |
2-door Regular Cab 2+2-door Double Cab 4-door Crew Cab |
2-door Regular Cab 2+2-door Double Cab 4-door Crew Cab |
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| Engine | 2.7L L4 (Turbocharged) |
3.0L I6 Diesel |
4.3 L V6 Ecotec V-6 VVT DI |
5.3L V8 Ecotec3 |
6.2L V8 Ecotec3 |
6.6L V-8 (L8T) | Duramax 6.6L V-8 TurboDiesel (L5P) | 6.6-liter V-8 (L8T) | Duramax 6.6-liter V-8 TurboDiesel (L5P) |
| Fuel | GAS | DIESEL | Flex Fuel | GAS / Flex Fuel | GAS | DIESEL | GAS | DIESEL | |
| Transmission | 8-speed Automatic | 10-speed Automatic | 8-speed Automatic | 8-speed Automatic | 10-speed Automatic | 6-speed Automatic | 10-speed Automatic | 6-speed Automatic | 10-speed Automatic |
| Drivetrain | RWD / 4WD | RWD / 4WD | RWD / 4WD | ||||||
| Power HP | 310 | 277 | 285 | 355 | 420 | 401 | 445 | 401 | 445 |
| Torque (lb-ft / Nm) | 348 / 472 | 460 / 624 | 305 / 414 | 383 / 519 | 460 / 624 | 464 / 630 | 910 / 1234 | 464 / 630 | 910 / 1234 |
| Top Speed | 100 mph | 100 mph | 100 mph | ||||||
| Weight | 4500 - 5000 lbs | 6092 lbs - 6570 lbs | 6955 lbs - 7467 lbs | 6249 lbs - 6730 lbs 6496 lbs- 7016 lbs - DRW |
7217 lbs - 7675 lbs 7445 lbs - 8018 lbs - DRW |
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| GVWR | 6800 lbs | 10000 lbs - 11350 lbs | 10000 lbs - 11350 lbs | ||||||
| Payload Capacity | Regular Cab: 2060 – 2240 lbs Double Сab: 2020 – 2160 lbs Crew Сab: 1950 – 2140 lbs |
Regular Cab - 3979 lbs Double Cab - 3854 lbs Crew Cab - 3862 lbs |
Regular Cab - 3715 lbs Double Cab - 3657 lbs Crew Cab - 3597 lbs |
Regular Cab - 4534 lbs Double Cab - 4391 lbs Crew Cab - 4398 lbs DRW Regular Cab - 7442 lbs Double Cab - 6985 lbs Crew Cab - 6894 lbs |
Regular Cab - 4217 lbs Double Cab - 4148 lbs Crew Cab - 4185 lbs DRW Regular Cab - 6532 lbs Double Cab - 6059 lbs Crew Cab - 5892 lbs |
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| Towing/Trailering | Regular Cab: 7700 – 10000 lbs Double Сab: 6600 – 12200 lbs Crew Сab: 6500 – 12100 lbs |
Regular Cab - 14500 lbs Double Cab - 14500 lbs Crew Cab - 14500 lbs |
Regular Cab - 14500 lbs Double Cab - 14500 lbs Crew Cab - 18500 lbs |
Regular Cab - 14500 lbs Double Cab - 14500 lbs Crew Cab - 14500 lbs DRW Regular Cab - 16800 lbs Double Cab - 16400 lbs Crew Cab - 16300 lbs |
Regular Cab - 14500 lbs Double Cab - 14500 lbs Crew Cab - 20000 lbs DRW Regular Cab - 20000 lbs Double Cab - 20000 lbs Crew Cab - 20000 lbs |
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| Wheelbase | Regular Cab - 139.6 in Double Сab - 147.4 in (6' 6" box) Crew Сab -147.4 in (5' 75" box), 157 in (6' 6" box) |
Regular Cab - 141.5 in (long box) Double Cab - 149.4 in (std. box) / 162.4 in (long box) Crew Cab - 158.9 in (std. box) / 172 in (long box) |
Regular Cab - 141.5 in (long box) Double Cab - 149.4 in (std. box) / 162.4 in (long box) Crew Cab - 158.9 in (std. box) / 172 in (long box) |
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| Width | 81.2 in | 81.9 in (SRW) 96.7 in (DRW) |
81.9 in (SRW) 96.7 in (DRW) |
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| Length | Regular Cab - 229.6 in Double Сab - 231 in (6'6" box) Crew Сab - 231.7 in (5'75" box), 241.2 in (6'6" box) |
Regular Cab - 235.5 in (long box) Double Cab - 240.4 in (std. box) / 256.4 in (long box) Crew Cab - 250 in (std. box) / 266 in (long box) |
Regular Cab - 235.5 in (long box) Double Cab - 240.4 in (std. box) / 256.4 in (long box) Crew Cab - 250 in (std. box) / 266 in (long box) |
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| Height | 75.5 in | 79.8 in | 79.8 in | ||||||
| Bed Length | Regular Cab - Long Box 98.2 in Double Cab - Standard Box 79.2 in Crew Cab - SB 69.0 in, LB 79.2 in |
82.3 in - standard box 98.3 in - long box |
82.3 in - standard box 98.3 in - long box |
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| Tire Size | P255/70R17 P265/65R18 P275/55R20 |
LT235/80R17 LT275/70R18 LT275/65R20 |
LT235/80R17 LT275/70R18 LT275/65R20 |
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| Wheel Bolt Pattern | 6x139.7 | 8x180 | 8x180 | ||||||
| Suspension | Front - Independent Rear - 2-Stage Multi-Leaf |
Front - Independent
Rear - 3-Stage Multi-Leaf |
Front - Independent
Rear - 3-Stage Multi-Leaf |
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| Seats | Regular Cab - 2 Double Сab - 5 (6) Crew Cab - 5 (6) |
Regular Cab - 3 Double Cab - 5 (6) Crew Cab - 5 (6) |
Regular Cab - 3 Double Cab - 5 (6) Crew Cab - 5 (6) |
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| MPG (Combined) | N/A | N/A | 21 mpg | 20 mpg | 18 mpg | 12 mpg | 15 mpg | 12 mpg | 15 mpg |
| Tank Capacity | 24 gal | 36 gal | 36 gal | 36 gal | |||||
| Warranty | 3 years or 36,000 Miles | ||||||||
| Safety Rating | NHTSA 5 Stars Overall Rating | ||||||||