Automatic Transmission Fluid (6-Speed Transmission) - GMC Sierra 2018 Owner's Manual

P (Park) to access this display.
See Driver Information Center
(DIC) (Uplevel and Denali
Cluster) 0 157 or Driver
Information Center (DIC) (Base
Level Cluster) 0 155.
2. Press and hold , or the trip
odometer reset stem if the
vehicle does not have DIC
buttons, for several seconds.
The oil life will change
to 100%.
The oil life system can also be reset
as follows:
1. Display the OIL LIFE
REMAINING on the DIC.
See Driver Information Center
(DIC) (Uplevel and Denali
Cluster) 0 157 or Driver
Information Center (DIC) (Base
Level Cluster) 0 155.
2. Fully press the accelerator
pedal slowly three times within
five seconds.
3. Display the OIL LIFE
REMAINING on the DIC. If the
display shows 100%, the
system is reset.
If the vehicle has a CHANGE
ENGINE OIL SOON message and it
comes back on when the vehicle is
started and/or the OIL LIFE
REMAINING is near 0%, the engine
oil life system has not been reset.
Repeat the procedure.
Automatic Transmission
Fluid (6-Speed
Transmission)
When to Check and Change
Automatic Transmission Fluid
It is usually not necessary to check
the transmission fluid level. The only
reason for fluid loss is a
transmission leak or overheated
transmission. If a small leak is
suspected, then use the following
checking procedures to check the
fluid level. However, if there is a
large leak, then it may be necessary
to have the vehicle towed to a
dealer service department and have
it repaired before driving the vehicle
further.
Vehicle Care
Caution
Use of the incorrect automatic
transmission fluid may damage
the vehicle, and the damage may
not be covered by the vehicle
warranty. Always use the
automatic transmission fluid listed
in Recommended Fluids and
Lubricants 0 440.
Change the fluid and filter at the
scheduled maintenance intervals
listed in Maintenance Schedule
0 432. Be sure to use the
transmission fluid listed in
Recommended Fluids and
Lubricants 0 440.
How to Check Automatic
Transmission Fluid
Caution
Too much or too little fluid can
damage the transmission. Too
much can mean that some of the
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