Photo: GMC Sierra by Ethan Llamas, CC BY-SA 4.0, via Wikimedia Commons. It shows the model, not always this exact version.
GMC · model year 1991
1991 GMC Sierra 2500 4WD
Pickup · 4-Wheel or All-Wheel Drive · Diesel · EPA class: Standard Pickup Trucks 4WD
EPA figures · 1991fueleconomy.gov
18MPG combined
17/21MPG city / highway
$5,300fuel a year
566 g CO₂ per mile 6.2 L 8-cyl Manual 5-spd
This car on fueleconomy.gov, read 2 October 2026. Your own figures depend on how and where you drive.
Where it places
Every figure on record
- Combined MPG
- 18 MPG
- City MPG
- 17 MPG
- Highway MPG
- 21 MPG
- Annual fuel cost
- $5,300
- Tailpipe CO₂
- 566 g per mile
- Model year
- 1991
- Body
- Pickup
- EPA size class
- Standard Pickup Trucks 4WD
- Drive
- 4-Wheel or All-Wheel Drive
- Engine
- 6.2 L 8-cyl
- Transmission
- Manual 5-spd
- Fuel
- Diesel
Efficiency
Running cost
The car
Powertrain
More GMC model years
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13 MPG · $5,150 fuel a year 1991 GMC Sierra 1500 4WD
12 MPG · $5,600 fuel a year 1991 GMC Sierra 1500 4WD
13 MPG · $5,150 fuel a year 1991 GMC Sierra 1500 4WD
13 MPG · $5,150 fuel a year 1991 GMC Sierra 1500 4WD
16 MPG · $6,000 fuel a year 1991 GMC Sierra 1500 4WD
16 MPG · $6,000 fuel a year
1991 GMC Sonoma 2WD
21 MPG · $3,200 fuel a year