Fuel
Use of the recommended fuel is an important part of the proper maintenance of this vehicle. To help keep the engine clean and maintain optimum vehicle performance, we recommend the use of gasoline advertised as TOP TIER Detergent Gasoline.
Look for the TOP TIER label on the fuel pump to ensure gasoline meets enhanced detergency standards developed by auto companies. A list of marketers providing TOP TIER Detergent Gasoline can be found at www.toptiergas.com.

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 9‑53. For all other vehicles, use only the unleaded gasoline described under Recommended Fuel on page 9‑51.
See also:
Lamp Messages
TURN SIGNAL ON
This message displays and a chime sounds if a turn signal is left on for 1.2 km (0.75 mile). Move the turn signal/multifunction lever to the off position. ...
Seat Issues
As I say, I liked the look of the leather seats. Once I started driving,
though, they offered no support in any direction; I felt like I was sitting on
top of the seat rather than in it. While it' ...
Denali details
The iconic Yukon Denali delves deeper into the luxury SUV realm with enhanced
features and craftsmanship that distinguish it from other models. It is a
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