Your FlexFuel vehicle automatically
detects the current fuel mixture in the
fuel tank and adjusts engine settings
accordingly. You can fill up with gasoline
or E85, regardless of which fuel is
already in the tank.
E85 is not yet available at all gas sta-
tions. E85 holds less energy per gallon
than gasoline, so drivers will experience
lower miles per gallon and cruising
range when running on E85.
See Section 5 of your Owner Manual.
23
Note: If your vehicle does not have the
yellow gas cap, do not use E85.
The Oil Life System calculates engine oil
life based on vehicle use and displays
CHANGE ENGINE OIL SOON on the
Driver Information Center (DIC) when it’s
necessary to change your engine oil and
filter. The Oil Life System should be
reset to 100% only following an oil
change.
To reset the Oil Life System:
1. Turn on the ignition.
2. Press the (Vehicle Information)
button until the DIC displays OIL LIFE
REMAINING.
3. Press and hold the (Set/Reset)
button until 100% is displayed.
4. Turn off the ignition.
See Section 5 of your Owner Manual.
Resetting the Oil Life System
OWNER INFORMATION
Sierra Accessories
A variety of GM accessories, such as
tubular assist steps, larger wheels and
tires, bedliners and bed extenders,
have been designed exclusively for
your Sierra to enhance its style and
functionality.
Accessories also are available for use
with the cargo management system,
including an overhead rack, sliding
metal toolbox, sliding metal bed divider,
and sliding metal side storage boxes.
Visit www.gmc.com, or see your GMC
dealer for information about the avail-
ability and installation of select Sierra
accessories.
