GMC · 1989–1992 · Diesel
GMC K2500 Sierra Diesel MPG by year
The EPA has rated 4 model years of the GMC K2500 Sierra Diesel, from 1989 to 1992. The most fuel-efficient year is the 1992, at 18 MPG combined in its best configuration. The best 1992 model is 6% more efficient than the best 1989 model (18 vs. 17 MPG). The 1992 model is about as efficient as the median full-size pickup (18 MPG).
Combined MPG by model year
- K2500 Sierra 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 K2500 Sierra Diesel model year
| Year | Type | Best combined | City / Hwy | Class median | Range | Configs | Fuel / yr |
|---|---|---|---|---|---|---|---|
| 1992 | Diesel | 18 MPG lowest 17 |
17 / 21 | 18 | — | 2 | $3,083 |
| 1991 | Diesel | 17 MPG lowest 16 |
15 / 20 | 17 | — | 2 | $3,265 |
| 1990 | Diesel | 16 MPG | 15 / 20 | 17 | — | 2 | $3,469 |
| 1989 | Diesel | 17 MPG lowest 16 |
15 / 20 | 17 | — | 2 | $3,265 |
Fuel cost uses today's default prices for every year so model years compare like for like. Sort any column.
Compare K2500 Sierra Diesel model years
See how much a newer K2500 Sierra Diesel would save over an older one.
Models similar to the GMC K2500 Sierra Diesel
- Chevrolet K1500 Pickup Diesel 1989–1998
- Chevrolet K2500 Pickup Diesel 1989–1993
- Chevrolet K2500 Pickup 1989–1992
- Dodge D100/D150 Pickup 1984–1993
- Ford F150 1984–2026
- Ford F250 1984–1999
- Dodge W100/W150 Pickup 1984–1993
- Chevrolet C2500 Pickup Diesel 1989–1993
- Chevrolet K1500 Pickup 1989–1999
- Chevrolet C1500 Pickup Diesel 1989–1996
Other GMC K2500 Sierra versions
Frequently asked questions
Which GMC K2500 Sierra Diesel year has the best fuel economy?
The 1992 GMC K2500 Sierra Diesel, rated up to 18 MPG combined. At 15,000 miles a year with $3.70/gal diesel fuel, that works out to about $3,083 a year.
Which GMC K2500 Sierra Diesel year has the worst fuel economy?
The 1990 model, whose most efficient version is rated 16 MPG combined (about $3,469 a year to fuel).
What is the fuel economy of the latest GMC K2500 Sierra Diesel?
The 1992 GMC K2500 Sierra Diesel is rated up to 18 MPG combined.