Chevrolet 1994 Blazer Owner's Manual page 124

Engine Coolant Temperature Gage
Standard Cluster Digital Cluster
If you have a standard cluster, this gage shows the engine coolant
temperature. If the gage pointer moves into the red area, your engine is too
hot!
It means that your engine coolant has overheated. If you have been
operating your vehicle under normal driving conditions, you should pull off
the road, stop your vehicle and turn off the engine as soon as possible.
If you have a digital cluster, a box around the temperature symbol will also
flash and a chime will sound when your engine is too hot.
Hot Coolant Can Burn you Badly! In Problems On The Road, this manual
explains what to do. See "Engine Overheating
"
in the Index.
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