Cooling System - Pontiac 2007 G5 Owner's Manual

3. Turn on your heater to full hot at the highest fan
speed and open the windows as necessary.
If you no longer have the overheat warning, you
can drive. Just to be safe, drive slower for about
10 minutes. If the warning does not come back on,
you can drive normally.
If the warning continues and you have not
stopped, pull over, stop, and park your vehicle
right away.
If there is still no sign of steam, you can idle the
engine for three minutes while you are parked.
If you still have the warning, turn off the engine
and get everyone out of the vehicle until it
cools down.
You may decide not to lift the hood but to get
service help right away.
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Cooling System

When you decide it is safe to lift the hood, here is
what you will see:
2.2L L4 Engine shown, 2.4L L4 Engine similar
A. Electric Engine Cooling Fan
B. Coolant Surge Tank and Pressure Cap