2018 GMC Sierra 1500 MPG, Gas Mileage & Range

2018 GMC Sierra 1500 EPA Fuel Economy Summary

The 2018 GMC Sierra 1500 delivers an EPA-certified 17–20 MPG combined (15–18 city / 19–24 highway depending on engine and drivetrain) across 14 configurations. Hybrid variants achieve up to 20 MPG combined, compared to 20 MPG for standard gasoline trims. Estimated annual fuel costs range from $3,100 to $4,450.

2018 GMC Sierra 1500 Powertrain & Efficiency Comparison

Factual efficiency differences across gasoline, hybrid, plug-in hybrid, and electric variants

Internal Combustion

Standard Gasoline Trims

17–20 MPG Combined

Annual Fuel Cost: $3,100–$4,450 (12 configurations)

Gas-Electric Hybrid

Hybrid (HEV) Trims

18–20 MPG Combined

Annual Fuel Cost: $3,100–$3,400 (Saves ~$0/yr vs gas)

Official EPA Fuel Economy Ratings by Configuration (14 Variants)

Laboratory certification test values across engine, transmission, and drivetrain permutations

Configuration / Model	Powertrain	Drivetrain	Transmission	City	Highway	Combined	Annual Fuel Cost	CO2 (g/mi)
Sierra 15 Hybrid 2WD Regular	5.3L Hybrid	Rear-Wheel Drive	Automatic 8-spd	18 MPG	24 MPG	20 MPG	$3,100	—
Sierra C15 2WD Gasoline or E85	4.3L 6-Cyl Gas	Rear-Wheel Drive	Automatic 6-spd	18 MPG	24 MPG	20 MPG	$3,100	—
Sierra K15 4WD Gasoline or E85	4.3L 6-Cyl Gas	4-Wheel Drive	Automatic 6-spd	17 MPG	22 MPG	19 MPG	$3,250	—
Sierra C15 2WD Regular	5.3L 8-Cyl Gas	Rear-Wheel Drive	Automatic 6-spd	16 MPG	23 MPG	19 MPG	$3,250	—
Sierra C15 2WD Gasoline or E85	5.3L 8-Cyl Gas	Rear-Wheel Drive	Automatic 6-spd	16 MPG	23 MPG	19 MPG	$3,250	—
Sierra 15 Hybrid 4WD Regular	5.3L Hybrid	4-Wheel Drive	Automatic 8-spd	16 MPG	21 MPG	18 MPG	$3,400	—
Sierra C15 2WD Regular	5.3L 8-Cyl Gas	Rear-Wheel Drive	Automatic 8-spd	16 MPG	22 MPG	18 MPG	$3,400	—
Sierra K15 4WD Regular	5.3L 8-Cyl Gas	4-Wheel Drive	Automatic 6-spd	16 MPG	22 MPG	18 MPG	$3,400	—
Sierra K15 4WD Gasoline or E85	5.3L 8-Cyl Gas	4-Wheel Drive	Automatic 6-spd	16 MPG	22 MPG	18 MPG	$3,400	—
Sierra C15 2WD Premium	6.2L 8-Cyl Gas	Rear-Wheel Drive	Automatic 8-spd	15 MPG	21 MPG	17 MPG	$4,450	—
Sierra K15 4WD Premium	6.2L 8-Cyl Gas	4-Wheel Drive	Automatic 8-spd	15 MPG	20 MPG	17 MPG	$4,450	—
Sierra K15 4WD Regular	5.3L 8-Cyl Gas	4-Wheel Drive	Automatic 8-spd	15 MPG	20 MPG	17 MPG	$3,600	—
Sierra C15 Cab Chassis 2WD Regular	5.3L 8-Cyl Gas	Rear-Wheel Drive	Automatic 6-spd	15 MPG	20 MPG	17 MPG	$3,600	—
Sierra K15 Cab Chassis 4WD Regular	5.3L 8-Cyl Gas	4-Wheel Drive	Automatic 6-spd	15 MPG	19 MPG	17 MPG	$3,600	—

EPA Test Methodology: Fuel economy estimates are determined by vehicle manufacturers in accordance with EPA regulations (40 CFR Part 600) and verified by EPA laboratories. Estimates assume 15,000 miles per year of driving (55% city, 45% highway) at prevailing fuel and electricity prices.

Deterministic Fuel Cost & Consumption Benchmarks

Standardized annual energy consumption and operating cost metrics based on 15,000 annual miles

Fuel Cost per 25 Miles

$4.38–$5.15

Based on $3.50 per gallon regular gasoline

Annual Fuel Consumption

750–882 Gallons

Estimated annual energy units needed for 15,000 miles

5-Year Fuel Cost vs Avg Vehicle

Official EPA Benchmark

Compared to the average new vehicle over 5 years

Related Official Reports for 2018 GMC Sierra 1500

Cross-reference safety ratings, owner defect complaints, and recall campaigns

← 2018 GMC Sierra 1500 Overview Vehicle summary, specifications, and primary KPI metrics. 2018 GMC Sierra 1500 Safety Ratings → NHTSA 5-Star NCAP crash tests, rollover risk, and active driver assistance. 2018 GMC Sierra 1500 Owner Complaints (297) → NHTSA consumer defect complaint filings by affected component. 2018 GMC Sierra 1500 Safety Recalls (7) → Official safety recall notices, defects, and free repair instructions. 2018 GMC Sierra 1500 Specifications → Certified engine options, transmission variants, and vehicle dimensions.