GMC · 1984–1985 · Diesel
GMC S15 Pickup Diesel MPG by year
The EPA has rated 2 model years of the GMC S15 Pickup Diesel, from 1984 to 1985. The most fuel-efficient year is the 1984, at 29 MPG combined in its best configuration. The best 1985 model is 3% less efficient than the best 1984 model (28 vs. 29 MPG). The 1985 model is 10% more efficient than the median small pickup that year (28 vs. 25.5 MPG).
Combined MPG by model year
- S15 Pickup Diesel, most efficient version
- Range across configurations
- Class median
Shaded band: range across that year's configurations. Class median: same-year models in the same class, rated in MPG. Click a point to open that model year; the table below lists every value.
Every S15 Pickup Diesel model year
| Year | Type | Best combined | City / Hwy | Class median | Range | Configs | Fuel / yr |
|---|---|---|---|---|---|---|---|
| 1985 | Diesel | 28 MPG lowest 27 |
26 / 31 | 25.5 | — | 4 | $1,982 |
| 1984 | Diesel | 29 MPG lowest 28 |
26 / 32 | 25 | — | 3 | $1,914 |
Fuel cost uses today's default prices for every year so model years compare like for like. Sort any column.
Compare S15 Pickup Diesel model years
See how much a newer S15 Pickup Diesel would save over an older one.
Models similar to the GMC S15 Pickup Diesel
Other GMC S15 Pickup versions
Frequently asked questions
Which GMC S15 Pickup Diesel year has the best fuel economy?
The 1984 GMC S15 Pickup Diesel, rated up to 29 MPG combined. At 15,000 miles a year with $3.70/gal diesel fuel, that works out to about $1,914 a year.
Which GMC S15 Pickup Diesel year has the worst fuel economy?
The 1985 model, whose most efficient version is rated 28 MPG combined (about $1,982 a year to fuel).
What is the fuel economy of the latest GMC S15 Pickup Diesel?
The 1985 GMC S15 Pickup Diesel is rated up to 28 MPG combined.