GMC 2002 Sierra - Manual (Page 394)

6-27
Checking the Fluid Level
Prepare your vehicle as follows:
D Park your vehicle on a level place. Keep the
engine running.
D With the parking brake applied, place the shift lever
in PARK (P).
D With your foot on the brake pedal, run the engine for
at least once minute and shift to DRIVE (D). Then
shift to NEUTRAL (N) and then REVERSE (R) to
fill the hydraulic system. Then, position the shift
lever in PARK (P).
D Allow the engine to run at idle (500 - 800 rpm).
Slowly release the brake pedal.
Then, without shutting off the engine, follow these steps:
Cold Check Procedure
The purpose of the cold check is to determine if the
transmission has enough fluid to be operated safely until
a hot check can be made. The fluid level rises as fluid
temperature increases. DO NOT fill above the COLD
CHECK band if the transmission fluid is below normal
operating temperatures.
1. 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.
3. Check the fluid level reading. Repeat the check
procedure to verify the reading.
4. If the fluid level is within the COLD CHECK band,
the transmission may be operated until the fluid is
hot enough to perform a hot check. If the fluid level
is not within the COLD CHECK band, add or drain
fluid as necessary to bring the level into the middle
of the COLD CHECK band.
5. Perform a hot check at the first opportunity after the
normal operating temperature of 160
_F (71_C) to
200
_F (93_C) is reached.
6. If the fluid level is in the acceptable range, push the
dipstick back in all the way.