Does the 2008 GMC Sierra K15 4WD take premium or regular gas?

The EPA lists the 2008 GMC Sierra K15 4WD 5.3L 8-cyl, Automatic 4-spd, AWD as taking regular. Combined MPG is 16, and at today's gas prices that's about $3,562 a year in fuel.

← all 2008 GMC Sierra K15 4WD trims

2008 GMC Sierra K15 4WD — 5.3L 8-cyl, Automatic 4-spd, AWD

This 2008 GMC Sierra K15 4WD (5.3L 8-cyl, Automatic 4-spd, AWD) takes regular (87-octane) gasoline. REGULAR

MPG combined (14 city / 19 hwy)

$3,562

est. fuel cost / year (today’s prices, 15k mi)

—

tailpipe CO₂

At today's AAA national average price ($3.80/gal, 2026-07-05) — the EPA's own price/date assumption isn't exposed in the public dataset, so we recompute this from the EPA's MPG figure and a sourced current price.

Other 2008 GMC Sierra K15 4WD trims

Trim	Fuel	MPG	Fuel/yr
4.8L 8-cyl, Automatic 4-spd, AWD	REGULAR	16	$3,562
4.3L 6-cyl, Automatic 4-spd, AWD	REGULAR	15	$3,800
6.0L 8-cyl, Automatic 4-spd, AWD	REGULAR	14	$4,071
5.3L 8-cyl, Automatic 4-spd, AWD	FLEX-FUEL	16	$3,900

EPA fuel type: Regular · class: Standard Pickup Trucks 4WD · engine: 5.3L 8-cyl · transmission: Automatic 4-spd · drive: AWD · MPG retrieved 2026-07-24.