Used 2021 GMC Sierra 1500 Double Cab SLE Pickup 4D 6 1/2 Ft
Pricing
Sign Up for Pricing Updates
Stay up to date by tracking the KBB.com Fair Purchase Price.
Calculate Your Budget With These KBB.com Tools
Values and Prices
Fair Purchase Price is determined by collecting thousands of actual consumer vehicle purchase prices, plus data from national vehicle registration databases and several other reliable third-party sources.
Estimated Values
Condition | Trade-In Value | Private Party Value | ||
|---|---|---|---|---|
Excellent | $23,380 | $28,350 | ||
Very Good | $22,980 | $27,850 | ||
Good | $22,480 | $27,250 | ||
Fair | $21,380 | $25,950 |
Estimated Trade-In Values for the 2021 GMC Sierra 1500 Double Cab SLE Pickup 4D 6 1/2 ft range from about $21,380 to $23,380 depending on vehicle condition. Estimated Private Party Values range from about $25,950 to $28,350 depending on vehicle condition. Valid for ZIP Code 85281 through 6/27/2026.
Specifications
Dimensions, Weights & Capacities
Curb Weight | 4920 lbs. | ||
|---|---|---|---|
Fuel Capacity | 24.0 gallons | ||
Front Head Room | 43.0 inches | ||
Front Leg Room | 44.5 inches | ||
Max Seating Capacity | 6 | ||
Minimum Ground Clearance | 8.1 inches | ||
Overall Length | 231.8 inches | ||
Front Shoulder Room | 66.0 inches | ||
Towing Capacity, Maximum | 11000 lbs. | ||
Trunk or Cargo Capacity | 71.7 cu.ft. | ||
Turning Diameter | 46.3 feet | ||
Wheel Base | 147.4 inches | ||
Bed Length | 6.50 feet | ||
Gross Vehicle Weight Rating (GVWR) | 7300 lbs. | ||
Payload Capacity | 2050 lbs. |
Exterior
Alloy Wheels | Available | ||
|---|---|---|---|
Fog Lights | Available | ||
Number of Doors | 4 doors | ||
Privacy Glass | Available | ||
LED Headlights | Available |
Fuel Economy
City | 14 mpg | ||
|---|---|---|---|
Highway | 20 mpg | ||
Combined | 16 mpg |
Mechanical
Drivetrain | 4WD | ||
|---|---|---|---|
Transmission Type | Automatic | ||
8 speed | Available | ||
Recommended Fuel | Regular | ||
Hill Descent Control | Available | ||
Hill Start Assist | Available | ||
Parking Assist System | Available |
Performance
Horsepower | 355 @ 5600 RPM | ||
|---|---|---|---|
Torque | 383 @ 4100 rpm | ||
Engine | V8, EcoTec3, DFM, 5.3 Liter |
Warranty
Basic | 3 years / 36000 miles | ||
|---|---|---|---|
Powertrain | 5 years / 60000 miles | ||
Corrosion | 3 years / 36000 miles |
2021 GMC Sierra 1500 Double Cab SLE Pickup 4D 6 1/2 ft Standard Features
2021 GMC Sierra 1500 Double Cab
KBB.com Review
Kbb.com Expert Rating
Professional yet premium attitude. Engines range from a turbo 4-cylinder to a 6-cylinder diesel and a big V8. Innovative hardware and technology to enhance work or play. Denali — the popular Sierra luxury version.
Doesn’t tow as much as the Ford F-150 and Ram 1500. Also lacks those rivals’ max payload rating. Not on the cutting edge of tech.
2021 GMC Sierra 1500 Double Cab
KBB.com Consumer Reviews
Consumer Rating
2021 GMC Sierra 1500 Double Cab SLE Pickup 4D 6 1/2 ft Safety
Safety Features & Technology
Crash Test Rating
Compare to Similar Vehicles
 Used 2021 GMC Sierra 1500 Double Cab SLE Pickup 4D 6 1/2 ft |  Used 2021 Ram 1500 Trucks |  Used 2025 Ford F150 Regular Cab |  Used 2021 Toyota Tacoma | ||
|---|---|---|---|---|---|
| Price | $29,000 | $26,100 | $31,500 | $23,000 | |
| KBB.com Rating | 4.2 | 4.5 | 4.7 | 4.6 | |
| Consumer Rating | 3.9 | 4.3 | 4.2 | 4.1 | |
| Fuel Economy | City 14/Hwy 20/Comb 16 MPG | City 23/Hwy 33/Comb 26 MPG | City 19/Hwy 25/Comb 21 MPG | City 20/Hwy 23/Comb 21 MPG | |
| Fuel Type | Gas | N/A | Gas | N/A | |
| Safety Rating | 4.0 | 5.0 | 5.0 | 4.0 | |
| Seating Capacity | 6 | N/A | 3 | 4 | |
| Basic Warranty | 3 years or 36000 miles | 3 years or 36000 miles | 3 years or 36000 miles | 3 years or 36000 miles | |
| Horsepower | 355 @ 5600 RPM | 260 @ 3600 RPM | 325 @ 5000 RPM | 159 @ 5200 RPM | |
| Engine | V8, EcoTec3, DFM, 5.3 Liter | V6, Turbo Diesel, 3.0 Liter | V6, EcoBoost, Twin Turbo, 2.7 Liter | 4-Cyl, 2.7 Liter | |
| Drivetrain | 4WD | 2WD | 2WD | 2WD |