1991 GMC R1500 Suburban 2WDFuel Economy & MPG Ratings
Diesel Special Purpose VehiclesRear-Wheel Drive
City
15
MPG
Highway
20
MPG
Combined
17
MPG
Trim Comparison
Automatic 4-spd
Diesel Diesel
City
15
Hwy
20
Comb
17
Fuel cost: $5,000/yr
Automatic 4-spd
Regular
City
11
Hwy
16
Comb
13
Fuel cost: $5,200/yr
| Trim | Engine | City | Hwy | Combined | Fuel Cost/yr |
|---|---|---|---|---|---|
| Automatic 4-spd | Diesel Diesel | 15 | 20 | 17 | $5,000 |
| Automatic 4-spd | Regular | 11 | 16 | 13 | $5,200 |
Annual Fuel Cost
$5,000
Based on gasoline at $3.67/gal, 15,000 miles/year
5-Year Fuel Savings
$-13,000
vs. average new vehicle
EPA Fuel Economy Score: -1/10
GHG Score: -1/10
Environment
- CO₂ Tailpipe Emissions
- 599 g/mile
- Annual Petroleum Consumption
- 21.0 barrels
Specifications
- Engine
- 6.2L 8-cyl
- Transmission
- 4-speed Automatic
- Drivetrain
- RWD
- Body Style
- Special Purpose Vehicles
Source: EPA fuel economy data & NHTSA vPIC. Specifications reflect the most common trim configuration.
Engine & Efficiency Details
Source: EPA fueleconomy.gov
- Engine Size
- 6.2L, 8-cylinder
- Induction Type
- (NO-CAT)
- Fuel Type
- Diesel
Annual Fuel Cost by State
Prices as of week ending May 18, 2026 · Source: EIA
National AvgEPA default
$4.490/gal$3,962/yr
California
$5.957/gal$5,256/yr
Texas
$3.888/gal$3,431/yr
Florida
$4.136/gal$3,649/yr
New York
$4.522/gal$3,990/yr
Ohio
$4.510/gal$3,979/yr
Washington
$5.591/gal$4,933/yr
Colorado
$4.618/gal$4,075/yr
Minnesota
$4.344/gal$3,833/yr
Massachusetts
$4.448/gal$3,925/yr
| State | Gas Price | Annual Cost | vs. National Avg |
|---|---|---|---|
| National AvgEPA default | $4.490/gal | $3,962/yr | — |
| California | $5.957/gal | $5,256/yrHIGHEST | +$1,294 |
| Texas | $3.888/gal | $3,431/yrLOWEST | $-531 |
| Florida | $4.136/gal | $3,649/yr | $-313 |
| New York | $4.522/gal | $3,990/yr | +$28 |
| Ohio | $4.510/gal | $3,979/yr | +$17 |
| Washington | $5.591/gal | $4,933/yr | +$971 |
| Colorado | $4.618/gal | $4,075/yr | +$113 |
| Minnesota | $4.344/gal | $3,833/yr | $-129 |
| Massachusetts | $4.448/gal | $3,925/yr | $-37 |
Calculated at 15,000 miles/year (EPA standard assumption) using 17 MPG combined. Regular gasoline prices. Actual costs vary.
Related
GMC R1500 Suburban 2WD MPG History
See how this model's fuel economy changed by year