1995 Buick Riviera Owner's Manual - Page 232
1995 Buick Riviera Manual
Page 232 highlights
LOW COOLANT LEVEL If this light comes on, itmeans you're low on engine coolant. To Add Coolant If you need more coolant, add the proper mix at the coolant recovery tank. Add coolant mix at the recovery tank, but be careful not to spill it. 6-23