Opel Blazer Operation & Maintenance Instructions Manual page 93

NOTICE:
If your engine catches fire because you keep driving
with no coolant, your vehicle can be badly
damaged.
If the coolant temperature gage shows an overheat
condition, but you see or hear no steam, try this for a
minute or so:
1. Turn off your air conditioner and turn on your heater
to full hot at the highest fan speed. Open the window
as necessary.
2. If you're in a traffic jam, shift to NEUTRAL (N);
otherwise, shift to the highest gear while driving.
If you no longer have the overheat warning, you can
drive. Just to be safe, drive slower for about 10
minutes. If the warning doesn't come back on, you can
drive normally.
If the warning continues, pull over, stop and park your
vehicle right away.
You may decide not to lift the hood but to get service
help right away.
If you decide to open the hood and the coolant inside
the coolant tank is boiling, don't do anything else until
it cools down.
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