GMC · 1989–1992 · Gas
GMC C2500 Sierra MPG by year
The EPA has rated 4 model years of the GMC C2500 Sierra, from 1989 to 1992. The most fuel-efficient year is the 1990, at 18 MPG combined in its best configuration. The best 1992 model is 6% less efficient than the best 1989 model (17 vs. 18 MPG). The 1992 model is 6% less efficient than the median full-size pickup that year (17 vs. 18 MPG).
Combined MPG by model year
- C2500 Sierra, 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 C2500 Sierra model year
| Year | Type | Best combined | City / Hwy | Class median | Range | Configs | Fuel / yr |
|---|---|---|---|---|---|---|---|
| 1992 | Gas | 17 MPG lowest 13 |
15 / 20 | 18 | — | 8 | $2,735 |
| 1991 | Gas | 17 MPG lowest 13 |
15 / 18 | 17 | — | 10 | $2,735 |
| 1990 | Gas | 18 MPG lowest 12 |
15 / 22 | 17 | — | 9 | $2,583 |
| 1989 | Gas | 18 MPG lowest 12 |
15 / 22 | 17 | — | 10 | $2,583 |
Fuel cost uses today's default prices for every year so model years compare like for like. Sort any column.
Compare C2500 Sierra model years
See how much a newer C2500 Sierra would save over an older one.
Models similar to the GMC C2500 Sierra
Other GMC C2500 Sierra versions
Frequently asked questions
Which GMC C2500 Sierra year has the best fuel economy?
The 1989 GMC C2500 Sierra, rated up to 18 MPG combined. At 15,000 miles a year with $3.10/gal regular gas, that works out to about $2,583 a year.
Which GMC C2500 Sierra year has the worst fuel economy?
The 1991 model, whose most efficient version is rated 17 MPG combined (about $2,735 a year to fuel).
What is the fuel economy of the latest GMC C2500 Sierra?
The 1992 GMC C2500 Sierra is rated up to 17 MPG combined.