← all 1989 GMC Sierra 1500 4WD trims
1989 GMC Sierra 1500 4WD — 5.0L 8-cyl, Automatic 3-spd, AWD
This 1989 GMC Sierra 1500 4WD (5.0L 8-cyl, Automatic 3-spd, AWD) takes regular (87-octane) gasoline. REGULAR
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.
This 1989 model was originally EPA-tested under the pre-2008 2-cycle method, which didn't account for highway speeds over 60 mph, air-conditioner use, or cold starts. When EPA overhauled the test for model year 2008, city ratings fell by about 12% and highway by about 8% on average industry-wide — and EPA retroactively adjusted every 1984-2007 rating to the stricter standard so old and new cars could be compared fairly. The MPG above is already on that modern scale — the window sticker on this car when it was new likely showed a higher, pre-2008-method number.
Other 1989 GMC Sierra 1500 4WD trims
| Trim | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 4.3L 6-cyl, Automatic 4-spd, AWD | REGULAR | 16 | $3,562 |
| 4.3L 6-cyl, 5-spd manual, AWD | REGULAR | 16 | $3,562 |
| 4.3L 6-cyl, Automatic 3-spd, AWD | REGULAR | 15 | $3,800 |
| 4.3L 6-cyl, 4-spd manual, AWD | REGULAR | 15 | $3,800 |
| 5.0L 8-cyl, Automatic 4-spd, AWD | REGULAR | 14 | $4,071 |
| 5.0L 8-cyl, 5-spd manual, AWD | REGULAR | 14 | $4,071 |
| 5.7L 8-cyl, Automatic 4-spd, AWD | REGULAR | 13 | $4,385 |
| 5.7L 8-cyl, 5-spd manual, AWD | REGULAR | 13 | $4,385 |
| 5.7L 8-cyl, 4-spd manual, AWD | REGULAR | 12 | $4,750 |
| 6.2L 8-cyl, Automatic 4-spd, AWD | DIESEL | 17 | $4,218 |
| 6.2L 8-cyl, 4-spd manual, AWD | DIESEL | 16 | $4,481 |
EPA fuel type: Regular · class: Standard Pickup Trucks · engine: 5.0L 8-cyl · transmission: Automatic 3-spd · drive: AWD · MPG retrieved 2026-07-24.