Pontiac 1999 Montana Owner's Manual page 325

To get the right reading, the fluid should be at normal
operating temperature, which is 180
_ _
(82 C to 93 C).
Get the vehicle warmed up by driving about 15 miles
(24 km) when outside temperatures are above 50
_
(10 C). If it's colder than 50
to drive longer.
Checking the Fluid Level
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, move the shift
lever through each gear range, pausing for about
three seconds in each range. Then, position the shift
lever in PARK (P).
D
Let the engine run at idle for three to five minutes.
_ _
F to 200 F
_
F
_ _
F (10 C), you may have
Then, without shutting off the engine, follow
these steps:
1. The dipstick is located toward the back of the engine
compartment, next to the brake master cylinder. The
dipstick has a bright, red loop design for easy
identification. Pull out the dipstick and wipe it with a
clean rag or paper towel.
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