1991 · Full-Size Pickup · Diesel

1991 GMC C2500 Sierra Diesel MPG & fuel economy

The 1991 GMC C2500 Sierra Diesel is a full-size pickup offered in 3 EPA-rated configurations. The most efficient version returns 19 MPG combined (17 city / 22 highway) on diesel. Across the lineup, combined ratings range from 17 to 19 MPG. That's up 2 MPG from the 1990 model. Among 27 full-size pickups rated for 1991, it ranks 21st for lowest fuel cost. At 15,000 miles a year with $3.70/gal diesel fuel, it costs about $2,921 a year to fuel.

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Combined 19 MPG 17 MPG city · 22 MPG hwy
Driving range — not published for this model
Your fuel cost $2,921 15,000 mi/yr · $19.47 per 100 mi
Class rank, 1991 #21 of 27 Full-Size Pickups by fuel cost

What will it cost you?

Your mileage and prices are saved and used across the site.

Fuel average

The 1991 GMC C2500 Sierra Diesel's fuel average is 8.1 km/L (12.4 L/100 km), or 19 MPG combined: 7.2 km/L in the city and 9.4 km/L on the highway.

MPGkm/LL/100 km
City177.213.8
Highway229.410.7
Combined198.112.4

How it ranks among 1991 Full-Size Pickups

Full class ranking →
  1. 1Mazda B Pickup22 MPG $2,114
  2. 2Dodge Dakota Pickup21 MPG $2,214
  3. 3Toyota Truck/T10021 MPG $2,214
  4. 4Isuzu Pickup20 MPG $2,325
  5. 5Mitsubishi Truck19 MPG $2,447
  6. 21GMC C2500 Sierra Diesel19 MPG $2,921
  7. 27Dodge W250 Pickup11 MPG $4,227
1991 C2500 Sierra DieselOther full-size pickupsClass median: $2,906/yr

Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.

C2500 Sierra Diesel MPG across model years

Full history →

3 EPA-rated configurations

ConfigurationTypeCityHwyCombinedRangeYour cost / yr
RWD · 6.2L 8-cyl · 5-speed manual
C2500 Sierra 2WD		 Diesel 17 MPG 22 MPG 19 MPG — $2,921
RWD · 6.2L 8-cyl · 4-speed automatic
C2500 Sierra 2WD		 Diesel 15 MPG 20 MPG 17 MPG — $3,265
RWD · 6.2L 8-cyl · 4-speed manual
C2500 Sierra 2WD		 Diesel 17 MPG 19 MPG 17 MPG — $3,265

Specs (most efficient configuration)

Fuel
Diesel
Engine / motor
6.2L 8-cyl
Transmission
5-speed manual
Drivetrain
RWD
Tailpipe CO₂
536 g/mi

1991 GMC C2500 Sierra Diesel vs. rivals

vs Chevrolet C2500 Pickup Diesel 19 MPG · $2,921/yr Same fuel cost vs Ford F150 16 MPG · $2,906/yr F150 saves $15/yr vs Ford F250 16 MPG · $2,906/yr F250 saves $15/yr vs Chevrolet K1500 Pickup 16 MPG · $2,906/yr K1500 Pickup saves $15/yr vs Chevrolet K2500 Pickup 16 MPG · $2,906/yr K2500 Pickup saves $15/yr vs Dodge D100/D150 Pickup 16 MPG · $2,906/yr D100/D150 Pickup saves $15/yr vs Chevrolet K2500 Pickup Diesel 18 MPG · $3,083/yr C2500 Sierra Diesel saves $162/yr vs Chevrolet K1500 Pickup Diesel 17 MPG · $3,265/yr C2500 Sierra Diesel saves $344/yr vs Dodge D250 Pickup 14 MPG · $3,321/yr C2500 Sierra Diesel saves $400/yr vs Dodge W100/W150 Pickup 13 MPG · $3,577/yr C2500 Sierra Diesel saves $656/yr vs Dodge W250 Pickup 11 MPG · $4,227/yr C2500 Sierra Diesel saves $1,306/yr vs GMC C2500 Sierra 17 MPG · $2,735/yr C2500 Sierra saves $186/yr

Compare the 1991 C2500 Sierra Diesel

With any other car from any year, including other C2500 Sierra Diesel model years. Type a year to jump, e.g. "2015 Accord".

Same year, other powertrains: 1991 GMC C2500 Sierra (17 MPG)

Frequently asked questions

What is the gas mileage of the 1991 GMC C2500 Sierra Diesel?

Up to 19 MPG combined (17 city / 22 highway); ratings range from 17 to 19 MPG depending on configuration.

What fuel does the 1991 GMC C2500 Sierra Diesel use?

Diesel.

What is the fuel average in km/L for the 1991 GMC C2500 Sierra Diesel?

The 1991 GMC C2500 Sierra Diesel's fuel average is 8.1 km/L (12.4 L/100 km), or 19 MPG combined: 7.2 km/L in the city and 9.4 km/L on the highway.

How much does it cost to fuel the 1991 GMC C2500 Sierra Diesel per year?

About $2,921 at 15,000 miles a year with $3.70/gal diesel fuel, or $19.47 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.

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