GMC 1995 Safari Owner's Manual page 110

Gages
Engine Coolant Temperature Gage
Standard Cluster Digital Cluster
If you have the standard cluster, you have a gage that shows the engine
coolant temperature. If the gage pointer moves to the
"H'
(red) side, 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 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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