Pontiac 2005 Bonneville - Manual (Page 290)

Then, without shutting off the engine, follow these steps:
The transaxle fluid cap is
located next to the radiator
hose and below the
engine air cleaner/filter
assembly on the driver’s
side of the vehicle.
See Engine Compartment
Overview on page 5-12
for more information
on location.
1. After removing the engine air cleaner/filter assembly
to reach the transaxle fluid cap, turn the cap
counterclockwise to remove. 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 both sides of the dipstick, and read the
lower level. The fluid level must be in the
cross-hatched area.
4. If the fluid level is in the acceptable range, push the
dipstick back in all the way and turn the handle
clockwise. Reinstall the engine air cleaner/filter
assembly.
5-30