2018 GMC Sierra K15 4WD

5.3L 8-cyl · 6-speed automatic · 4WD

Flex-fuel (gas/E85)Gasoline or E85Standard Pickup Trucks 4WD

Official EPA record #39404 from FuelEconomy.gov · data 2026-07-26 · every assumption below is yours to edit. How this is computed

Per month

$219.32

Per year

$2,632

Per mile

21.9¢/mi

5-year total

$13,160

pickup body style — not this exact model

Notes & official EPA estimate

658 gal of fuel / yeargasoline @ $4.00/galAt $5.00/gal: $274.15/mo

A mile road trip costs about $65.70 in energy.

Running on E85: about $2,466/year at the current default price.

Official FuelEconomy.gov estimate: $3,450/year — assumes 15,000 miles/year and EPA price assumptions. The figures above use your inputs instead.

Compare with another vehiclePrices: EPA national averages, Jul 24, 2026 — override anytime.

At 12,000 miles per year (55% city / 45% highway) with EPA national-average prices ($4.00/gal regular), this 2018 GMC Sierra K15 4WD costs about $219.32 per month in fuel — $2,632 per year, 21.9¢/mi, $13,160 over five years.Assumptions are editable below. Prices as of July 24, 2026 · EPA vehicle record #39404. EPA figures are laboratory estimates; real-world cost varies with driving conditions, weather, and where you buy energy.

GMC Sierra: running costs for every model year →

Official EPA efficiency

Measure	Value
City MPG	16
Highway MPG	22
Combined MPG	18
E85 MPG (city/hwy/combined)	11 / 16 / 13

Official EPA estimates

Estimate	Value
Official annual fuel cost (15,000 mi/yr)	$3,450/yr
Tailpipe CO₂	489 g/mi
EPA greenhouse gas score	3/10
EPA smog rating (Federal Tier 3 Bin 125)	3/10

Source: U.S. EPA / DOE FuelEconomy.gov, vehicle record #39404 (record updated 2018-12-18). Snapshot processed 2026-07-26; page data last changed 2018-12-18.

View this record on FuelEconomy.gov

Related configurations

Same year, same family

Adjacent model years