Engine Oil Life System; Automatic Transmission; Fluid - GMC duramax diesel 2016 Supplement Manual

96 Vehicle Care
trash or pouring it on the ground,
into sewers, or into streams or
bodies of water. Recycle it by taking
it to a place that collects used oil.

Engine Oil Life System

The engine oil life system calculates
engine oil life based on vehicle use
and displays the CHANGE ENGINE
OIL SOON message when it is time
to change the engine oil and filter.
The oil life system should be reset
to 100% only following an oil
change. See Engine Oil Life
System in the owner manual.

Automatic Transmission

Fluid

When to Check and Change
(4-Cylinder Pickup Models)
Refer to Automatic Transmission
Fluid in the owner manual.
When to Check and Change
(8-Cylinder Pickup Models)
Change the fluid and filter at the
intervals listed. See Maintenance
Schedule 0 116.
Use the transmission fluid listed in
Recommended Fluids and
Lubricants 0 121.
How to Check
Because this operation can be a
little difficult, the decision may be
made to have this done by your
dealer.
If the decision is made to perform
this operation, be sure to follow all
the instructions here, or a false
reading on the dipstick could result.
Caution
Too much or too little fluid can
damage the transmission. Too
much can mean that some of the
fluid could come out and fall on
hot engine parts or exhaust
system parts, starting a fire. Too
little fluid could cause the
transmission to overheat. Be sure
to get an accurate reading if
checking the transmission fluid.
Wait at least 30 minutes before
checking the transmission fluid level
if the vehicle has been driven:
When outside temperatures are
above 32 °C (90 °F).
At high speed for quite a while.
In heavy traffic especially in
hot weather.
While pulling a trailer.
Checking the Fluid Level
Prepare the vehicle as follows:
Park the vehicle on a level
place. Keep the engine running.
With the parking brake applied,
place the shift lever in P (Park).
With a foot on the brake pedal,
run the engine for at least
one minute and shift to D
(Drive). Then shift to N (Neutral)
and then R (Reverse) to fill the
hydraulic system. Then, put the
shift lever in P (Park).
Allow the engine to run at idle
(500 800 rpm). Slowly release
the brake pedal.