1998 Pontiac Grand Prix Owner's Manual - Page 297

Automatic Transaxle Fluid When to Check and Change A good time to check your automatic transaxle fluid level is when the engine oil is changed. Change boththe fluid and filter every 50,000 miles (83 000 km) if the vehicle is mainly driven under one or more ofthese conditions: 0 In heavy city traffic where the outside temperature regularly reaches90"F (32 O C)or higher. 0 How to Check Because this operation can be little difficult,you may a choose to havethis done at your Pontiac dealership Service Department. If you do it yourself, be sure to follow all the instructions here, or you could getfalse reading on a the dipstick. NOTICE: Too much ortoo little fluid can damage your transaxle. Too much can mean that some of the fluid could come out and fallhot engine parts on or exhaust system parts, starting a fire. Be sure to get an accurate reading if you check your transaxle fluid. 0 In hilly or mountainous terrain. When doing frequent trailer towing. Uses such as found in taxi, police or delivery service. If you do not useyour vehicle under any these of conditions, the fluid and filter not require changing. do See "Scheduled Maintenance Services" in the Index. 6-22