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2013 GMC Sierra K15 AWD — 6.2L 8-cyl, Automatic 6-spd, AWD
This 2013 GMC Sierra K15 AWD (6.2L 8-cyl, Automatic 6-spd, AWD) is flex-fuel (gasoline or E85). FLEX-FUEL
14
MPG combined (12 city / 18 hwy)
$4,450
est. fuel cost / year (EPA, 15k mi)
623 g/mi
tailpipe CO₂
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.
EPA fuel type: Gasoline or E85 · class: Standard Pickup Trucks 4WD · engine: 6.2L 8-cyl · transmission: Automatic 6-spd · drive: AWD · MPG retrieved 2026-07-24.