← all 2020 GMC Sierra Cab Chassis 2WD trims
2020 GMC Sierra Cab Chassis 2WD — 4.3L 6-cyl, Automatic 6-spd, RWD
This 2020 GMC Sierra Cab Chassis 2WD (4.3L 6-cyl, Automatic 6-spd, RWD) takes regular (87-octane) gasoline. REGULAR
17
MPG combined (15 city / 19 hwy)
$3,650
est. fuel cost / year (EPA, 15k mi)
523 g/mi
tailpipe CO₂
Other 2020 GMC Sierra Cab Chassis 2WD trims
| Trim | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 5.3L 8-cyl, Automatic 6-spd, RWD | REGULAR | 15 | $4,150 |
EPA fuel type: Regular · class: Special Purpose Vehicle 2WD · retrieved 2026-06-14.