GMC 1995 Safari Owner's Manual page 225

To check transmission fluid hot: Get the vehicle warmed up by driving
about 15 miles (24 km) when outside temperatures are above 50" F
(
10" C ) .
If it's colder than
50°F (lO"C),
drive the vehicle in THIRD GEAR (D) until
the engine temperature gage moves and then remains steady for ten minutes.
Then follow the hot check procedures.
To check transmission fluid cold: A cold check is made after the vehicle
has been sitting for eight hours or more with the engine off and is used only
as a reference. Let the engine run at idle for five minutes if outside
temperatures are 50°F (10°C) or more. If it's colder than 50°F (lO"C), you
may have to idle the engine longer. Should the fluid level be low during a
cold check, you
must perform a hot check before adding fluid. This will
give you a more accurate reading of the fluid level.
To check the fluid hot or cold
Park your vehicle on a level place. Keep the engine running.
With the parking brake applied, place the shift lever in PARK (P).
With your 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 PARK (P).
Let the engine run at idle for three minutes or more.
Then, without shutting off the engine, follow these steps:
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.
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