1997 Chevy Blazer temp guage

OMISSTAB

MEMBER
1997 CHEVROLET BLAZER
6 CYL
4WD
AUTOMATIC
18,500 MILES

One day I got in my 1997 chevy blazer and it said " check guages". I noticed that the temperature guage was in the red zone. Fluids were checked, all full. The car is not overheating but the temp guage has not left the red hot zone. Any suggestions?

1 Reply

IMPALASS

MECHANIC
3,112 POSTS

Hello -

If coolant temperature is too high or oil pressure is too low, light comes on to alert driver of condition indicated by gauges. A CHECK GAUGES light driver (part of coolant temperature gauge) monitors signals from temperature gauge sending unit and oil pressure sending unit. If CHECK GAUGES light driver receives a signal from either sending unit, it grounds light.

I have attached two checks for you. I wasn't sure if when you said you got into the vehicle if it was already driven, thus hot or first thing and it was cold. Here are two checks though.

COOLANT TEMPERATURE GAUGE
Gauge Indicates Cold When Engine Is Hot
Disconnect temperature gauge sending unit connector. Connect jumper between ground and Dark Green wire terminal of sending unit connector. Turn ignition on. If gauge indicates hot, replace sending unit. If gauge does not indicate hot, check Dark Green wire between sending unit and cluster. If wire is okay, replace instrument cluster.
Gauge Indicates Hot When Engine Is Cold
Disconnect temperature gauge sending unit connector. Turn ignition on. If gauge indicates cold, replace sending unit. If gauge still indicates hot, check Dark Green wire between sending unit and cluster. If wire is okay, replace instrument cluster.

Let me know what you find out.