1993 Pontiac Bonneville Owner's Manual - Page 237

Service & Appearance Care Automatic Transax/eFluid When to Check and Change: A good time to check your automatic transaxle fluid level is when the engine oil is changed. Refer to the Maintenance Schedule to determine when to change your fluid. See the Index under Scheduled MaintenanceServices. How to Check: Because this operation can be alittle difficult, you may choose to have this done at a dealership Service Department. If you do it yourself, be sure to follow all the instructions here, or you could get a false reading on the dipstick. Too much or too little fluid can damage your transaxle. Too much can mean that some of the fluid could come out and fall on hot engine parts, starting a fire. Be sure to get an accurate reading if you check your transaxle fluid. Wait at least 30 minutes before checking the transaxle fluid level if you have been driving: When outside temperatures are above 90"F (32"C). At high speed for quite a while. In heavy traffic-especially in hot weather. While pulling a trailer. To get the right reading, fluid should the be at normal operating temperature, which is 180°F to 200°F (82°C to 93"C). Get the vehicle warmed up driving by about 15 miles (24 km) when outside temperatures are above 50"F (10"C). If it's colder than 50°F (lO°C), you may have to drive longer.