GMC · 1984–1991 · Diesel
GMC Suburban Diesel MPG by year
The EPA has rated 8 model years of the GMC Suburban Diesel, from 1984 to 1991. The most fuel-efficient year is the 1987, at 18 MPG combined in its best configuration. The best 1991 model is 6% less efficient than the best 1984 model (17 vs. 18 MPG). The 1991 model is about as efficient as the median special purpose vehicle (17 MPG).
Combined MPG by model year
- Suburban 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 Suburban Diesel model year
| Year | Type | Best combined | City / Hwy | Class median | Range | Configs | Fuel / yr |
|---|---|---|---|---|---|---|---|
| 1991 | Diesel | 17 MPG lowest 16 |
15 / 20 | 17 | — | 2 | $3,265 |
| 1990 | Diesel | 17 MPG lowest 16 |
15 / 21 | 17 | — | 2 | $3,265 |
| 1989 | Diesel | 17 MPG lowest 16 |
15 / 22 | 17 | — | 2 | $3,265 |
| 1988 | Diesel | 17 MPG lowest 16 |
15 / 21 | 16.5 | — | 2 | $3,265 |
| 1987 | Diesel | 18 MPG lowest 16 |
16 / 21 | 17 | — | 3 | $3,083 |
| 1986 | Diesel | 18 MPG lowest 16 |
16 / 22 | 17.5 | — | 2 | $3,083 |
| 1985 | Diesel | 18 MPG lowest 16 |
15 / 22 | 17 | — | 3 | $3,083 |
| 1984 | Diesel | 18 MPG lowest 16 |
16 / 22 | 17 | — | 3 | $3,083 |
Fuel cost uses today's default prices for every year so model years compare like for like. Sort any column.
Compare Suburban Diesel model years
See how much a newer Suburban Diesel would save over an older one.
Models similar to the GMC Suburban Diesel
Other GMC Suburban versions
Frequently asked questions
Which GMC Suburban Diesel year has the best fuel economy?
The 1985 GMC Suburban 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 Suburban Diesel year has the worst fuel economy?
The 1988 model, whose most efficient version is rated 17 MPG combined (about $3,265 a year to fuel).
What is the fuel economy of the latest GMC Suburban Diesel?
The 1991 GMC Suburban Diesel is rated up to 17 MPG combined.