1998 Buick Riviera Owner's Manual - Page 260

Checking the Fluid Level Park your vehicle on a level place. Keep;he engine running. The transale fluid dipstick is a round, red loop losated next to the area. bmke master cylinder. Pull 'out the dipstick and wipe it with a clean rag o paper towel. r 3. Check bothsides of the dipstick, and read the lower level. The fluid level must bein the cross-hatched 4. If the fluid level is i the acceptable range, push n the dipstick back all -the in way.