GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - crc - 5/11/17
30
In Brief
Fuel (Gasoline - Except
L86 6.2L Engine)
Regular Fuel
Use only unleaded gasoline rated
87 octane or higher in your vehicle.
Do not use gasoline with an octane
rating lower as it may result in
vehicle damage and lower fuel
economy. See
Fuel (Gasoline - L86 6.2L
Engine)
Premium Recommended Fuel
Use premium 93 octane unleaded
gasoline in your vehicle. Unleaded
gasoline with an octane rating as
low as 87 may be used, but it will
reduce performance and fuel
economy. See
.
Fuel (Diesel)
For diesel vehicles, do not use
gasoline. See
“
Fuel for Diesel
Engines
”
in the Duramax diesel
supplement.
E85 or FlexFuel
FlexFuel Possible
Certain models are compatible with
E85 fuel. See
Engine Oil Life System
The engine oil life system calculates
engine oil life based on vehicle use
and, on most vehicles, displays a
DIC message when it is necessary
to change the engine oil and filter.
The oil life system should be reset
to 100% only following an oil
change.
Resetting the Oil Life System
To reset the engine oil life system:
1. Display OIL LIFE REMAINING
on the DIC.
See
(DIC) (Uplevel and Denali
Cluster)
or
Information Center (DIC) (Base
Level Cluster)
. If the
vehicle does not have DIC
buttons, the vehicle must be in
P (Park) to access this display.
2. Press and hold
V
on the DIC,
or the trip odometer reset stem
if the vehicle does not have
DIC buttons, for several
seconds. The oil life will
change to 100%.