1997 Buick Riviera Owner's Manual - Page 256

How to Check Because this operation can be little difficult, you may a choose to have this done at your Buick dealership Service Department. To get the right reading, the fluid should be at normal operating temperature, which 1SO"F to200°F is (82°C to 93°C). Get the vehicle warmed up driving about 15 miles by (24 km) when outside temperatures are above 50°F (10°C). If it's colder than50°F (lO"C), you may have to drive longer. If you do it yourself, be sure to follow the instructions al l the here, or you could get false reading on dipstick. a Checking the Fluid Level 0 Park your vehicle on a level place. Keep the engine running. Too much or too little fluid can damage your 0 With the parking brake applied, place the shift lever transaxle. Too much can mean that some of the in PARK (P). fluid could come out and fall on hot engine parts or exhaust system parts, starting a fire. Be sure to 0 With your foot on the brake pedal, move the shift get an accurate readingyou check your if lever through each gear range, pausing about for transaxle fluid. three seconds in each range. Then, position the shift lever in PARK (P). for Wait at least 30 minutes before checking the transaxle 0 Let the engine run at idle three tofive minutes. fluid level if you have been driving: When outside temperatures above 90 O F (32"C ) . are 0 At high speed for quite a while. In heavy traffic - especially in hot weather. While pulling a trailer. NOTICE: 6-19