GMC Sierra Quiz
In Brief

Fuel E85 (85% Ethanol)

In this manual: In Brief
Introduction — 6In Brief — 46Seats and Restraints — 48Storage — 7Instruments and Controls — 75Lighting — 22Infotainment System — 22Climate Controls — 7Driving and Operating — 77Vehicle Care — 79Service and Maintenance — 26Technical Data — 8Customer Information — 25OnStar — 25Keys, Doors, and Windows — 38
~1min read

Vehicles that have a FlexFuel badge and a yellow fuel cap can use either unleaded gasoline or ethanol fuel containing up to 85% ethanol (E85).

See Fuel E85 (85% Ethanol) on page 9‑76. For all other vehicles, use only the unleaded gasoline described under Recommended Fuel on page 9‑74.

Test yourself

A quick GMC Sierra quiz: every answer comes with an explanation and a link to the manual page.