GMC duramax diesel 2016 Supplement Manual page 101

100 Vehicle Care
fluid. Checking the fluid hot will give
you a more accurate reading of the
fluid level.
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,
move the shift lever through
each gear range, pausing for
about three seconds in each
range. Then, position the shift
lever in P (Park).
Let the engine run at idle for
three minutes or more.
Then, without shutting off the
engine, follow these steps:
The transmission dipstick is near
the center of the engine
compartment and will be labeled
with the graphic shown.
See Engine Compartment Overview
0 87 for location.
1. Flip the handle up and then pull
out the dipstick and wipe it with
a clean rag or paper towel.
2. Push it back in all the way, wait
three seconds, and then pull it
back out again.
Check both sides of the
dipstick, and read the lower
level. The fluid level must be in
the COLD area for a cold
check or in the HOT or
cross-hatched area for a hot
check. Be sure to keep the
dipstick pointed down to get an
accurate reading.
3. If the fluid level is in the
acceptable range, push the
dipstick in all the way, then flip
the handle down to lock the
dipstick in place.
How to Add Fluid
See Recommended Fluids and
Lubricants 0 121 to determine what
kind of transmission fluid to use.
Using a funnel, add fluid down the
transmission dipstick tube only after
checking the transmission fluid
while it is hot. A cold check is used
only as a reference. If the fluid level
is low, add only enough of the
proper fluid to bring the level up to
the HOT area for a hot check.
It does not take much fluid,
generally less than 0.5 L (1 pt). Do
not overfill.
Caution
Use of the incorrect automatic
transmission fluid may damage
the vehicle, and the damage may
not be covered by the vehicle
(Continued)