1997 Buick Riviera Owner's Manual - Page 136

Engine Coolant Temperature Gage Your vehicle has a gage that shows the engine coolant temperature. If the gage pointer moves into red the area, yourengine is too hot! 100 Low Coolant Warning Light When this light comes on, the cooling system is low on coolant. As a bulb check, it will come on two to for four seconds and then go off when the ignition is in RUN. If the light doesn't come on, have the vehicle serviced. 280 TEMP LOW COOIANT This reading means the same thing as warning light. the It means that your engine coolant has overheated. If you have been operating your vehicle under normal driving off conditions, you should pull the road, stop your off vehicle and turn the engine as soon as possible. The section "Problems on Road" in this manual the explains what to do. "Engine Overheating" in See the Index. If the coolant level is low, the light will come back on and a warning chime will sound. this happens,see If "Engine Coolant"in the Index for proper cooling system fill. After the coolant levelis returned toits proper level, the LOW COOLANT light will gooff after 20 seconds or remain off during the next ignition cycle. 2-75