2005 Pontiac Bonneville Owner's 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. 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. 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. 5-30