2005 GMC Sierra 2500 HD 2WD CNGFuel Economy & MPG Ratings

Gasoline Standard Pickup Trucks 2WDRear-Wheel Drive

City

MPG

Highway

MPG

Combined

MPG

Trim Comparison

Automatic 4-spd

CNG CNG

City

Hwy

Comb

Fuel cost: $4,950/yr

Trim	Engine	City	Hwy	Combined	Fuel Cost/yr
Automatic 4-spd	CNG CNG	8	11	9	$4,950

Annual Fuel Cost

$4,950

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

5-Year Fuel Savings

$-12,750

vs. average new vehicle

EPA Fuel Economy Score: -1/10

GHG Score: -1/10

Environment

CO₂ Tailpipe Emissions: 781 g/mile
Annual Petroleum Consumption: 0.2 barrels

Specifications

Engine: 6L 8-cyl
Transmission: 4-speed Automatic
Drivetrain: RWD
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: 6L, 8-cylinder
Fuel Type: Natural Gas

Annual Fuel Cost by State

Prices as of week ending May 18, 2026 · Source: EIA

National AvgEPA default

$4.490/gal$7,483/yr

California

$5.957/gal$9,928/yr

Texas

$3.888/gal$6,480/yr

Florida

$4.136/gal$6,893/yr

New York

$4.522/gal$7,537/yr

Ohio

$4.510/gal$7,517/yr

Washington

$5.591/gal$9,318/yr

Colorado

$4.618/gal$7,697/yr

Minnesota

$4.344/gal$7,240/yr

Massachusetts

$4.448/gal$7,413/yr

State	Gas Price	Annual Cost	vs. National Avg
National AvgEPA default	$4.490/gal	$7,483/yr	—
California	$5.957/gal	$9,928/yrHIGHEST	+$2,445
Texas	$3.888/gal	$6,480/yrLOWEST	$-1,003
Florida	$4.136/gal	$6,893/yr	$-590
New York	$4.522/gal	$7,537/yr	+$54
Ohio	$4.510/gal	$7,517/yr	+$34
Washington	$5.591/gal	$9,318/yr	+$1,835
Colorado	$4.618/gal	$7,697/yr	+$214
Minnesota	$4.344/gal	$7,240/yr	$-243
Massachusetts	$4.448/gal	$7,413/yr	$-70