2020 GMC Sierra 3500 Accessories & Parts
2020 GMC Sierra 3500 Parts
2020 GMC Sierra 3500 Wheels & Tires
2020 GMC Sierra 3500 Exterior Accessories
Running Boards- Off-Road Bumpers
- Custom Hoods
- Towing & Hitches
- Body Kits
- Mirrors
- Grille Guards
- Bed Accessories
- Chrome Trim
- Bug Deflectors
- Commercial Van Equipment
- Custom Grilles
- Tonneau Covers
- Wind Deflectors
- Fender Flares
- Roof Racks
- Winches
- Car Covers
- Bike Racks
- Light Covers
- Wiper Blades
- Mud Flaps
- Armor & Protection
- Car Wraps
- Spoilers
- License Plates & Frames
- Emblems & Logos
- Sunroof Visors
- Spare Tire Covers & Carriers
- Custom Horns
- Car Tents
- Snow Plows
- Auto Detailing
2020 GMC Sierra 3500 Automotive Lighting
2020 GMC Sierra 3500 Body Parts
2020 GMC Sierra 3500 Interior Accessories
2020 GMC Sierra 3500 Maintenance
2020 GMC Sierra 3500 Audio & Electronics
2020 GMC Sierra 3500 Automotive Tools
- Diagnostic & Testing Tools
- Engine Service Tools
- Pullers & Installers
- Suspension & Steering Service Tools
- A/C Tools & Equipment
- Cooling System Service Tools
- Automotive Lifts & Stands
- Fuel System Service
- Wheel & Tire Service Tools
- Oil Change Tools
- Jacks
- Brake Service Tools
- Spark Plug & Ignition 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
Popular Accessories
- Replacement Headlights
- Black Tail Lights
- Custom Tail Lights
- Fiber Optic Tail Lights
- LED Tail Lights
- Lift Kits
- Suspension
- Accelerator Pedals
- Auxiliary / Driving Lights
- Bed Bars
- Diesel Emission
- Fuel Delivery
- Fuel Transfer Tanks
- Mirror Covers
- Sequential Tail Lights
- Suspension
- Towing & Hitches
- Trunk & Tailgate Moldings
2020 GMC Sierra 3500 Specifications
| Model | 3500 HD | |
|---|---|---|
| Submodel | Base, SLE, SLT, AT4, Denali | |
| Body Type | 2-door Regular Cab 2+2-door Double Cab 4-door Crew Cab | |
| Engine | 6.6-liter V-8 (L8T) | Duramax 6.6-liter V-8 TurboDiesel (L5P) |
| Fuel | Gasoline | DIESEL |
| Transmission | Hydra-Matic 6L90 6-speed Automatic | Allison® 10L1000 10-speed Automatic |
| Drivetrain | RWD / 4WD | |
| Power | 401 hp @ 5200 rpm | 445 hp @ 2800 rpm |
| Torque | 464 lb-ft @ 4000 rpm / 630 Nm | 910 lb-ft @ 1600 rpm / 1234 Nm |
| 0-60 | 6.3 sec | 6.0 sec |
| Top Speed | 100 mph | |
| Weight (lbs.) | 6249 - 6730 6496 - 7016 - DRW (Dual Rear Wheel) | 7217 - 7675 7445 - 8018 - DRW (Dual Rear Wheel) |
| GVWR (lbs.) | 10000 - 11350 | |
| Payload (lbs.) | Regular Cab - 4534 Double Cab - 4391 Crew Cab - 4398 DRW Regular Cab - 7442 Double Cab - 6985 Crew Cab - 6894 | Regular Cab - 4217 Double Cab - 4148 Crew Cab - 4185 DRW Regular Cab - 6532 Double Cab - 6059 Crew Cab - 5892 |
| Towing/Trailering (lbs.) | Regular Cab - 14500 Double Cab - 14500 Crew Cab - 14500 DRW Regular Cab - 16800 Double Cab - 16400 Crew Cab - 16300 5th Wheel/Gooseneck: 16200 - 17200 | Regular Cab - 14500 Double Cab - 14500 Crew Cab - 20000 DRW Regular Cab - 20000 Double Cab - 20000 Crew Cab - 20000 5th Wheel/Gooseneck: 21500 - 35500 |
| Wheelbase (in. / mm) | Regular Cab - 141.5 / 3595 (long box) Double Cab: 149.4 / 3795 (std. box) 162.4 / 4127 (long box) Crew Cab: 158.9 / 4037 (std. box) 172 / 4369 (long box) | |
| Bed Length | 82.3 in - standard box 98.3 in - long box | |
| Bed Width | 71.40 in | |
| Bed Height | 21.00 in | |
| Width (in. / mm) | 81.9 / 2079 (SRW) 96.7 / 2457 (DRW) | |
| Length (in. / mm) | Regular Cab - 235.5 / 5982 (long box) Double Cab: 240.4 / 6107 (std. box) 256.4 / 6514 (long box) Crew Cab: 250 / 6349 (std. box) 266 / 6756 (long box) | |
| Height (in.) | 79.8 / 2027 | |
| Tire Size | LT235/80R17 ALS and AT (DRW) LT265/70R17 AT LT245/75R17 ALS LT275/70R18 AT LT275/65R20 AT | |
| Wheel Bolt Pattern | 8x180 | |
| Seats | Regular Cab - 3 Double Cab - 5 (6) Crew Cab - 5 (6) | |
| MPG (Combined) | 12 mpg | 15 mpg |
| Lights | High-Intensity Discharge (HID) projector-beam headlamps.
Includes GMC signature LED lighting. | |
| Tank Capacity | 36 gal | Regular Cab - 28 gal Double Cab: 29.4 gal (std box) 36 gal (long box) Crew Cab - 36 gal |
| Brakes | 4-wheel disc with 4-wheel antilock | |
| Brake Rotor Size (in / mm) | Front: 14 x 1.6 / 355 x 40
Rear: 14.1 x 1.3 / 360 x 34 (Single Rear Wheel) Rear: 14 x 1.6 / 355 x40 (Dual Rear Wheel) | |
| Suspension | Front: Short long arms independent with torsion bars Rear: Semi-elliptic three-stage multi-leaf spring | |
| Safety/Security | Automatic Emergency Braking Bed View Camera Following Distance Indicator Forward Collision Alert Front and Rear Park Assist HD Rear Vision Camera HD Surround Vision Hitch Guidance Hitch Guidance with Hitch View LED Daytime Running Lamps Lane Change Alert with Side Blind Zone Alert Lane Departure Warning OnStar® & GMC Connected Services capable Rear Cross Traffic Alert Safety Alert Seat StabiliTrak, electronic stability control system with traction control Teen Driver Tire Pressure Monitoring System Trailer Tire Pressure and Temperature Sensors | |
| Warranty | Bumper-to-Bumper Limited - 3 Years/36,000 Miles Corrosion Protection - 3 Years/36,000 Miles Rust-Through - 6 Years/100,000 Miles Powertrain/Drivetrain Limited - 5 Years/60,000 Miles; HD Duramax Diesel: 5 Years/100,000 Miles Roadside Assistance Program - 5 Years/60,000 Miles | |