1997 Buick Riviera Owner's Manual - Page 255

How to Check and Ad(. -1 - Automatic Transaxle Fluid When to Check and Change A good time to check your automatic transaxle fluid oil level is when the engine is changed. Change both the fluid and filter every 50,000 miles (83 000 km) if the vehicle is mainly driven under one or moreof these conditions: Check oil only when the engi-_- cold. Allow the is two engine to cool to three hours after running. If you remove the supercharger oil fill plug while the engine is hot, pressure cause hot oil to may blow outof the oil fill hole. may be burned. You Do not remove the plug until the engine cools. 1. Clean the area around the fill plug before oil removing it. In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) or higher. 2. Remove theoil fill plug using a 3/16 inch Allen.wench. 3. The oil level is correct whenit just reaches the bottom of the threadsof the inspection hole. 4. Replace theoil plug with the O-ring in place. Torque to 88 lb-in (10 Nam). In hilly or mountainous terrain. When doing frequent trailer towing. 0 Uses such as foundin taxi, police or delivery service. If you do not use your vehicle under of these any conditions, the fluid and do not require changing. filter See "Scheduled Maintenance Services" the Index. in 0 6-18