Buick 1993 LeSabre Owner's Manual page 244

Wait at least 30 minutes before checking the transaxle
fluid level if you have been driving:
0
When outside temperatures are above
90
"
F (32
"
C).
0
At high speed for quite a while.
0
In heavy traffic -- especially in hot weather.
While pulling a trailer.
To get the right reading, the fluid should be at normal
operating temperature, which is 180 F to 200
"
F (82
"
C
to 93 " C ) .
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 (1 0
'
C), you may have
to
drive longer.
To check the fluid level:
Park your vehicle on a level place.
Place the shift lever in 7'" (Park) with the parking
With your foot on the brake pedal, move the shift
brake applied.
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 to five minutes.
Then, without shutting off the engine, follow these
steps:
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.
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