1990 · Full-Size Pickup · Diesel

1990 GMC C2500 Sierra Diesel MPG & fuel economy

The 1990 GMC C2500 Sierra Diesel is a full-size pickup offered in 2 EPA-rated configurations. The most efficient version returns 17 MPG combined (15 city / 20 highway) on diesel. That's down 2 MPG from the 1989 model. Among 26 full-size pickups rated for 1990, it ranks 20th for lowest fuel cost. At 15,000 miles a year with $3.70/gal diesel fuel, it costs about $3,265 a year to fuel.

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Combined 17 MPG 15 MPG city · 20 MPG hwy

Driving range — not published for this model

Your fuel cost $3,265 15,000 mi/yr · $21.76 per 100 mi

Class rank, 1990 #20 of 26 Full-Size Pickups by fuel cost

What will it cost you?

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

Miles per year Diesel $/gal

Fuel average

The 1990 GMC C2500 Sierra Diesel's fuel average is 7.2 km/L (13.8 L/100 km), or 17 MPG combined: 6.4 km/L in the city and 8.5 km/L on the highway.

	MPG	km/L	L/100 km
City	15	6.4	15.7
Highway	20	8.5	11.8
Combined	17	7.2	13.8

How it ranks among 1990 Full-Size Pickups

Full class ranking →

1Toyota Truck/T10023 MPG $2,022
2Mazda B Pickup22 MPG $2,114
3Dodge Dakota Pickup21 MPG $2,214
4Jeep Comanche Pickup21 MPG $2,214
5Mitsubishi Truck19 MPG $2,447
···
20GMC C2500 Sierra Diesel17 MPG $3,265
···
26Dodge W250 Pickup12 MPG $3,875

1990 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 →

2 EPA-rated configurations

Configuration	Type	City	Hwy	Combined	Range	Your cost / yr
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	16 MPG	18 MPG	17 MPG	—	$3,265

Specs (most efficient configuration)

Fuel: Diesel
Engine / motor: 6.2L 8-cyl
Transmission: 4-speed automatic
Drivetrain: RWD
Tailpipe CO₂: 599 g/mi

1990 GMC C2500 Sierra Diesel vs. rivals

vs Chevrolet C2500 Pickup Diesel 17 MPG · $3,265/yr Same fuel cost vs Dodge D250 Pickup 14 MPG · $3,321/yr C2500 Sierra Diesel saves $57/yr vs Ford F250 15 MPG · $3,100/yr F250 saves $165/yr vs Chevrolet C1500 Pickup Diesel 18 MPG · $3,083/yr C1500 Pickup Diesel saves $181/yr vs Chevrolet K1500 Pickup Diesel 16 MPG · $3,469/yr C2500 Sierra Diesel saves $204/yr vs Chevrolet K2500 Pickup Diesel 16 MPG · $3,469/yr C2500 Sierra Diesel saves $204/yr vs Dodge W100/W150 Pickup 13 MPG · $3,577/yr C2500 Sierra Diesel saves $312/yr vs Chevrolet K1500 Pickup 16 MPG · $2,906/yr K1500 Pickup saves $358/yr vs Chevrolet K2500 Pickup 16 MPG · $2,906/yr K2500 Pickup saves $358/yr vs Dodge W250 Pickup 12 MPG · $3,875/yr C2500 Sierra Diesel saves $610/yr vs GMC C2500 Sierra 18 MPG · $2,583/yr C2500 Sierra saves $681/yr

Compare the 1990 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: 1990 GMC C2500 Sierra (18 MPG)

Frequently asked questions

What is the gas mileage of the 1990 GMC C2500 Sierra Diesel?

Up to 17 MPG combined (15 city / 20 highway).

What fuel does the 1990 GMC C2500 Sierra Diesel use?

Diesel.

What is the fuel average in km/L for the 1990 GMC C2500 Sierra Diesel?