2018 GMC Sierra K15 Cab Chassis 4WDFuel Economy & MPG Ratings

Gasoline Special Purpose Vehicle 4WD4-Wheel Drive

City

MPG

Highway

MPG

Combined

MPG

Trim Comparison

Automatic 6-spd

Regular

City

Hwy

Comb

Fuel cost: $3,950/yr

Trim	Engine	City	Hwy	Combined	Fuel Cost/yr
Automatic 6-spd	Regular	15	19	17	$3,950

Annual Fuel Cost

$3,950

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

5-Year Fuel Savings

$-7,750

vs. average new vehicle

EPA Fuel Economy Score: 3/10

GHG Score: 3/10

Environment

CO₂ Tailpipe Emissions: 523 g/mile
Annual Petroleum Consumption: 17.5 barrels

Specifications

Engine: 5.3L 8-cyl
Transmission: 6-speed Automatic
Drivetrain: 4WD
Body Style: Special Purpose Vehicle 4WD

Source: EPA fuel economy data & NHTSA vPIC. Specifications reflect the most common trim configuration.

Engine & Efficiency Details

Source: EPA fueleconomy.gov

Engine Size: 5.3L, 8-cylinder
Induction Type: Direct Injection
Fuel Type: Regular Gasoline

Annual Fuel Cost by State

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

National AvgEPA default

$4.490/gal$3,962/yr

California

$5.957/gal$5,256/yr

Texas

$3.888/gal$3,431/yr

Florida

$4.136/gal$3,649/yr

New York

$4.522/gal$3,990/yr

Ohio

$4.510/gal$3,979/yr

Washington

$5.591/gal$4,933/yr

Colorado

$4.618/gal$4,075/yr

Minnesota

$4.344/gal$3,833/yr

Massachusetts

$4.448/gal$3,925/yr

State	Gas Price	Annual Cost	vs. National Avg
National AvgEPA default	$4.490/gal	$3,962/yr	—
California	$5.957/gal	$5,256/yrHIGHEST	+$1,294
Texas	$3.888/gal	$3,431/yrLOWEST	$-531
Florida	$4.136/gal	$3,649/yr	$-313
New York	$4.522/gal	$3,990/yr	+$28
Ohio	$4.510/gal	$3,979/yr	+$17
Washington	$5.591/gal	$4,933/yr	+$971
Colorado	$4.618/gal	$4,075/yr	+$113
Minnesota	$4.344/gal	$3,833/yr	$-129
Massachusetts	$4.448/gal	$3,925/yr	$-37