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2021 Chevrolet Silverado 4WD TrailBoss — 4.3L 6-cyl, Automatic 6-spd, 4WD
This 2021 Chevrolet Silverado 4WD TrailBoss (4.3L 6-cyl, Automatic 6-spd, 4WD) takes regular (87-octane) gasoline. REGULAR
16
MPG combined (14 city / 18 hwy)
$3,562
est. fuel cost / year (today’s prices, 15k mi)
560 g/mi
tailpipe CO₂
At today's AAA national average price ($3.80/gal, 2026-07-05) — the EPA's own price/date assumption isn't exposed in the public dataset, so we recompute this from the EPA's MPG figure and a sourced current price.
Other 2021 Chevrolet Silverado 4WD TrailBoss trims
| Trim | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 5.3L 8-cyl, Automatic 10-spd, 4WD | REGULAR | 18 | $3,167 |
| 5.3L 8-cyl, Automatic 10-spd, 4WD | REGULAR | 17 | $3,353 |
| 5.3L 8-cyl, Automatic 6-spd, 4WD | REGULAR | 16 | $3,562 |
| 5.3L 8-cyl, Automatic 6-spd, 4WD | REGULAR | 15 | $3,800 |
| 6.2L 8-cyl, Automatic 10-spd, 4WD | PREMIUM | 17 | $4,129 |
| 6.2L 8-cyl, Automatic 10-spd, 4WD | PREMIUM | 17 | $4,129 |
| 6.2L 8-cyl, Automatic 10-spd, 4WD | PREMIUM | 16 | $4,388 |
EPA fuel type: Regular · class: Standard Pickup Trucks 4WD · engine: 4.3L 6-cyl · transmission: Automatic 6-spd · drive: 4WD · MPG retrieved 2026-07-24.