Buick 2004 LeSabre Owner's Manual page 260

Checking the Fluid Level
Prepare your vehicle as follows:
•
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 to five minutes.
5-22
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.
The transaxle fluid dipstick
top is a round, red loop
and is located next to the
brake master cylinder
behind the engine block.
See Engine Compartment
Overview on page 5-12
for more information
on location.