1993 Cadillac DeVille Owner's Manual - Page 288

AUTOMATIC T R A S . 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 "Scheduled Maintenance Services" in the Index. How to Check Because this operation can be a little difficult, you may choose to have this done at a Cadillac dealership Service Department. If you do it yourself, be sure to follow all the instructions here, you or could get afalse reading on the dipstick. Wait at least 30 minutes before checking the transaxle fluid level if you have been driving: 0 When outside temperatures are above 90" F (32°C). 0 At high speed for quite a while. In heavy traffic -- especially in hot weather. While pulling a trailer. To get the right reading, thefluid should be at normal operating temperature, which is 180°F to 200" F (82 " C to 93 " C). Get thevehicle warmed up by driving about 15 miles (24 km) when outside temperatures areabove 50°F (10°C). If it's colder than 50°F (10" C), you may have to drive longer. 275