1990 · Full-Size Pickup · Diesel

1990 GMC Sierra Diesel MPG & fuel economy

The 1990 GMC Sierra Diesel is a full-size pickup offered in 4 EPA-rated configurations. The most efficient version returns 18 MPG combined (16 city / 22 highway) on diesel. Across the lineup, combined ratings range from 16 to 18 MPG. That's down 1 MPG from the 1989 model. Among 26 full-size pickups rated for 1990, it ranks 17th for lowest fuel cost. At 15,000 miles a year with $3.70/gal diesel fuel, it costs about $3,083 a year to fuel.

Compare
Combined 18 MPG 16 MPG city · 22 MPG hwy
Driving range — not published for this model
Your fuel cost $3,083 15,000 mi/yr · $20.56 per 100 mi
Class rank, 1990 #17 of 26 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 1990 GMC Sierra Diesel's fuel average is 7.7 km/L (13.1 L/100 km), or 18 MPG combined: 6.8 km/L in the city and 9.4 km/L on the highway.

MPGkm/LL/100 km
City166.814.7
Highway229.410.7
Combined187.713.1

How it ranks among 1990 Full-Size Pickups

Full class ranking →
  1. 1Toyota Truck/T10023 MPG $2,022
  2. 2Mazda B Pickup22 MPG $2,114
  3. 3Dodge Dakota Pickup21 MPG $2,214
  4. 4Jeep Comanche Pickup21 MPG $2,214
  5. 5Mitsubishi Truck19 MPG $2,447
  6. 17GMC Sierra Diesel18 MPG $3,083
  7. 26Dodge W250 Pickup12 MPG $3,875
1990 Sierra DieselOther full-size pickupsClass median: $2,906/yr

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

Sierra Diesel MPG across model years

Full history →

4 EPA-rated configurations

ConfigurationTypeCityHwyCombinedRangeYour cost / yr
RWD · 6.2L 8-cyl · 4-speed automatic
Sierra 1500 2WD		 Diesel 16 MPG 22 MPG 18 MPG — $3,083
RWD · 6.2L 8-cyl · 4-speed manual
Sierra 1500 2WD		 Diesel 17 MPG 20 MPG 18 MPG — $3,083
4WD/AWD · 6.2L 8-cyl · 4-speed automatic
Sierra 1500 4WD		 Diesel 15 MPG 20 MPG 16 MPG — $3,469
4WD/AWD · 6.2L 8-cyl · 4-speed manual
Sierra 1500 4WD		 Diesel 15 MPG 17 MPG 16 MPG — $3,469

Specs (most efficient configuration)

Fuel
Diesel
Engine / motor
6.2L 8-cyl
Transmission
4-speed automatic
Drivetrain
RWD
Tailpipe CO₂
566 g/mi

1990 GMC Sierra Diesel vs. rivals

vs Chevrolet C1500 Pickup Diesel 18 MPG · $3,083/yr Same fuel cost vs Ford F250 15 MPG · $3,100/yr Sierra Diesel saves $17/yr vs Chevrolet C2500 Pickup Diesel 17 MPG · $3,265/yr Sierra Diesel saves $181/yr vs Dodge D100/D150 Pickup 16 MPG · $2,906/yr D100/D150 Pickup saves $177/yr vs Ford F150 16 MPG · $2,906/yr F150 saves $177/yr vs Chevrolet K1500 Pickup 16 MPG · $2,906/yr K1500 Pickup saves $177/yr vs Chevrolet K2500 Pickup 16 MPG · $2,906/yr K2500 Pickup saves $177/yr vs GMC Sierra 18 MPG · $2,583/yr Sierra saves $500/yr

Compare the 1990 Sierra Diesel

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

Same year, other powertrains: 1990 GMC Sierra (18 MPG)

Frequently asked questions

What is the gas mileage of the 1990 GMC Sierra Diesel?

Up to 18 MPG combined (16 city / 22 highway); ratings range from 16 to 18 MPG depending on configuration.

What fuel does the 1990 GMC Sierra Diesel use?

Diesel.

What is the fuel average in km/L for the 1990 GMC Sierra Diesel?

The 1990 GMC Sierra Diesel's fuel average is 7.7 km/L (13.1 L/100 km), or 18 MPG combined: 6.8 km/L in the city and 9.4 km/L on the highway.

How much does it cost to fuel the 1990 GMC Sierra Diesel per year?

About $3,083 at 15,000 miles a year with $3.70/gal diesel fuel, or $20.56 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.

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