Does the 2011 GMC Sierra C15 2WD take premium or regular gas?

The EPA lists the 2011 GMC Sierra C15 2WD 4.3L 6-cyl, Automatic 4-spd, RWD as taking regular. Combined MPG is 17, and at today's gas prices that's about $3,353 a year in fuel.

← all 2011 GMC Sierra C15 2WD trims

2011 GMC Sierra C15 2WD — 4.3L 6-cyl, Automatic 4-spd, RWD

This 2011 GMC Sierra C15 2WD (4.3L 6-cyl, Automatic 4-spd, RWD) takes regular (87-octane) gasoline. REGULAR

MPG combined (15 city / 20 hwy)

$3,353

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.

EPA updated its fuel-economy equations again for model year 2017 — mostly affecting hybrids and turbocharged engines — and recalculated 2011-2016 ratings to match, in some cases 1-2 MPG lower. The number above already reflects that update.

Other 2011 GMC Sierra C15 2WD trims

Trim	Fuel	MPG	Fuel/yr
5.3L 8-cyl, Automatic 6-spd, RWD	FLEX-FUEL	17	$3,650
4.8L 8-cyl, Automatic 4-spd, RWD	FLEX-FUEL	16	$3,900
6.2L 8-cyl, Automatic 6-spd, RWD	FLEX-FUEL	14	$4,450

EPA fuel type: Regular · class: Standard Pickup Trucks 2WD · engine: 4.3L 6-cyl · transmission: Automatic 4-spd · drive: RWD · MPG retrieved 2026-07-24.