1991 GMC Sierra 2500 4WDFuel Economy & MPG Ratings

Diesel Standard Pickup Trucks 4WD4-Wheel or All-Wheel Drive

Photo: sv1ambo. CC BY 2.0. via Wikimedia Commons

City

MPG

Highway

MPG

Combined

MPG

Trim Comparison

Manual 5-spd

Diesel Diesel

City

Hwy

Comb

Fuel cost: $4,700/yr

Trim	Engine	City	Hwy	Combined	Fuel Cost/yr
Manual 5-spd	Diesel Diesel	17	21	18	$4,700

Annual Fuel Cost

$4,700

Based on gasoline at $3.67/gal, 15,000 miles/year

5-Year Fuel Savings

$-11,500

vs. average new vehicle

EPA Fuel Economy Score: -1/10

GHG Score: -1/10

Environment

CO₂ Tailpipe Emissions: 566 g/mile
Annual Petroleum Consumption: 19.8 barrels

Specifications

Engine: 6.2L 8-cyl
Transmission: 5-speed Manual
Drivetrain: AWD
Body Style: Pickup Truck
GVWR: Class 2-3 (6,001–10,000 lbs)

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: (DIESEL) (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$3,742/yr

California

$5.957/gal$4,964/yr

Texas

$3.888/gal$3,240/yr

Florida

$4.136/gal$3,447/yr

New York

$4.522/gal$3,768/yr

Ohio

$4.510/gal$3,758/yr

Washington

$5.591/gal$4,659/yr

Colorado

$4.618/gal$3,848/yr

Minnesota

$4.344/gal$3,620/yr

Massachusetts

$4.448/gal$3,707/yr

State	Gas Price	Annual Cost	vs. National Avg
National AvgEPA default	$4.490/gal	$3,742/yr	—
California	$5.957/gal	$4,964/yrHIGHEST	+$1,222
Texas	$3.888/gal	$3,240/yrLOWEST	$-502
Florida	$4.136/gal	$3,447/yr	$-295
New York	$4.522/gal	$3,768/yr	+$26
Ohio	$4.510/gal	$3,758/yr	+$16
Washington	$5.591/gal	$4,659/yr	+$917
Colorado	$4.618/gal	$3,848/yr	+$106
Minnesota	$4.344/gal	$3,620/yr	$-122
Massachusetts	$4.448/gal	$3,707/yr	$-35