2021 GMC Sierra 1500 mpg
Combined mpg, 2WD Reg Cab 140"
17mpg
- 16 city, 21 highway.
- 2 mpg below the median of 13 trucks (2021).
- 29 trims: 16 to 24 mpg.
12,000 miles a year. Gas $3.20.
| Trim | Engine | Drive | City mpg | Hwy mpg | Combined | Tank, gal | Miles per tank | Cost a year |
|---|---|---|---|---|---|---|---|---|
| AT4 Crew Cab LB 4WD | 3.0L 6cyl | 4WD | 22 | 26 | 24 | 24.0 | 576 | $1,600 |
| SLE Double Cab RWD | 2.7L | RWD | 20 | 23 | 21 | 24.0 | 504 | $1,829 |
| Elevation Double Cab RWD | 2.7L | RWD | 20 | 23 | 21 | 24.0 | 504 | $1,829 |
| SLE Crew Cab RWD | 2.7L | RWD | 20 | 23 | 21 | 24.0 | 504 | $1,829 |
| Elevation Crew Cab RWD | 2.7L | RWD | 20 | 23 | 21 | 24.0 | 504 | $1,829 |
| 4WD Double Cab 147" Elevation w/3VL | 2.7L | 4WD | 18 | 21 | 19 | 24.0 | 456 | $2,021 |
| SLE Double Cab 4WD | 2.7L | 4WD | 18 | 21 | 19 | 24.0 | 456 | $2,021 |
| 4WD Double Cab 147" Elevation w/3SB | 2.7L 4cyl | 4WD | 18 | 21 | 19 | 24.0 | 456 | $2,021 |
| SLE Crew Cab 4WD | 2.7L 4cyl | 4WD | 18 | 21 | 19 | 24.0 | 456 | $2,021 |
| 4WD Crew Cab 147" Elevation w/3VL | 2.7L | 4WD | 18 | 21 | 19 | 24.0 | 456 | $2,021 |
| SLE Crew Cab LB 4WD | 2.7L 4cyl | 4WD | 18 | 21 | 19 | 24.0 | 456 | $2,021 |
| 4WD Crew Cab 147" Elevation w/3SB | 2.7L 4cyl | 4WD | 18 | 21 | 19 | 24.0 | 456 | $2,021 |
| Elevation Crew Cab 4WD | 2.7L 4cyl | 4WD | 18 | 20 | 19 | 24.0 | 456 | $2,021 |
| Elevation Crew Cab LB 4WD | 2.7L 4cyl | 4WD | 18 | 21 | 19 | 24.0 | 456 | $2,021 |
| Denali Crew Cab 4WD | 5.3L 8cyl | 4WD | 16 | 22 | 19 | 24.0 | 456 | $2,021 |
| Denali Crew Cab LB 4WD | 5.3L 8cyl | 4WD | 16 | 22 | 19 | 24.0 | 456 | $2,021 |
| AT4 Crew Cab 4WD | 5.3L 8cyl | 4WD | 16 | 21 | 18 | 24.0 | 432 | $2,133 |
| 2WD Reg Cab 140" | 4.3L 6cyl | 2WD | 16 | 21 | 17 | 28.0 | 476 | $2,259 |
| Double Cab RWD | 4.3L | RWD | 16 | 21 | 17 | 24.0 | 408 | $2,259 |
| 4WD Reg Cab 140" | 4.3L | 4WD | 15 | 20 | 17 | 28.0 | 476 | $2,259 |
| Crew Cab RWD | 4.3L | RWD | 16 | 21 | 17 | 24.0 | 408 | $2,259 |
| Double Cab 4WD | 4.3L | 4WD | 15 | 20 | 17 | 24.0 | 408 | $2,259 |
| Crew Cab 4WD | 4.3L | 4WD | 15 | 20 | 17 | 24.0 | 408 | $2,259 |
| Crew Cab LB 4WD | 4.3L | 4WD | 15 | 20 | 17 | 24.0 | 408 | $2,259 |
| SLT Crew Cab RWD | 5.3L | RWD | 15 | 22 | 17 | 24.0 | 408 | $2,259 |
| Denali Crew Cab RWD | 5.3L | RWD | 15 | 22 | 17 | 24.0 | 408 | $2,259 |
| Elevation Double Cab 4WD | 5.3L 8cyl | 4WD | 14 | 20 | 16 | 24.0 | 384 | $2,400 |
| SLT Crew Cab 4WD | 5.3L 8cyl | 4WD | 14 | 20 | 16 | 24.0 | 384 | $2,400 |
| SLT Crew Cab LB 4WD | 5.3L 8cyl | 4WD | 14 | 20 | 16 | 24.0 | 384 | $2,400 |
Fuel cost
2WD Reg Cab 140", 17 mpg combined.
- Per year
- $2,259
- Per month
- $188
- Per mile
- 18.8 cents
- Fill the tank
- $89.60
- Best mpg: AT4 Crew Cab LB 4WD, 24 mpg. $1,600 a year.
- Top trim: Denali Crew Cab LB 4WD. $2,021 a year. $238 less than the 2WD Reg Cab 140".
Trip cost
| Trip | Gallons | Cost |
|---|---|---|
| 100 miles | 4.8 | $15.24 |
| 300 miles | 14.3 | $45.71 |
| 500 miles | 23.8 | $76.19 |
| 1,000 miles | 47.6 | $152 |
Commute cost
- Per month
- $163
- Per year
- $1,958
- Miles a month
- 867
2WD Reg Cab 140". 20 miles each way, 5 days a week.
Is 17 mpg good? No. Beats 7% of 2026 cars.
MPG by year
Rivals
| Car | Cheapest trim | Combined mpg | Compare |
|---|---|---|---|
| 2021 GMC Sierra 1500 | 2WD Reg Cab 140" | 17 mpg | |
| 2021 Ford F-150 | XL 2WD Reg Cab 6.5' Box | 21 mpg | Compare |
| 2021 Chevrolet Silverado 1500 | 2WD Reg Cab 140" Work Truck | 17 mpg | Compare |
| 2021 RAM 1500 | Classic Express 4x2 Reg Cab 6'4" Box | 17 mpg | Compare |
| 2021 GMC Canyon | Elevation Standard Extended Cab RWD | 22 mpg | Compare |
| 2021 Toyota Tundra | SR Double Cab RWD | 15 mpg | Compare |
| 2021 Nissan Frontier | S King Cab RWD | 20 mpg |
What this cannot tell you
EPA ratings. Your own mpg will differ.
Gas prices change by state and by week.
- 2 or more sources
- 1 source
- Model-level, rule or estimate
- Sources disagree