← all 1990 GMC C2500 Sierra 2WD trims
1990 GMC C2500 Sierra 2WD — 4.3L 6-cyl, Automatic 3-spd, RWD
This 1990 GMC C2500 Sierra 2WD (4.3L 6-cyl, Automatic 3-spd, RWD) takes regular (87-octane) gasoline. REGULAR
15
MPG combined (15 city / 16 hwy)
$4,150
est. fuel cost / year (EPA, 15k mi)
—
tailpipe CO₂
Other 1990 GMC C2500 Sierra 2WD trims
| Trim | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 4.3L 6-cyl, 5-spd manual, RWD | REGULAR | 18 | $3,450 |
| 4.3L 6-cyl, 4-spd manual, RWD | REGULAR | 15 | $4,150 |
| 5.0L 8-cyl, Automatic 4-spd, RWD | REGULAR | 15 | $4,150 |
| 5.0L 8-cyl, 5-spd manual, RWD | REGULAR | 15 | $4,150 |
| 5.0L 8-cyl, Automatic 3-spd, RWD | REGULAR | 13 | $4,800 |
| 5.7L 8-cyl, Automatic 4-spd, RWD | REGULAR | 13 | $4,800 |
| 5.7L 8-cyl, 5-spd manual, RWD | REGULAR | 13 | $4,800 |
| 5.7L 8-cyl, 4-spd manual, RWD | REGULAR | 12 | $5,200 |
| 6.2L 8-cyl, Automatic 4-spd, RWD | DIESEL | 17 | $4,600 |
| 6.2L 8-cyl, 4-spd manual, RWD | DIESEL | 17 | $4,600 |
EPA fuel type: Regular · class: Standard Pickup Trucks · retrieved 2026-06-14.