Cooling System - Chevrolet 2007 HH7 Owner's Manual

Cooling System

When you decide it is safe to lift the hood, here is
what you will see:
A. Pressure Cap
B. Coolant Recovery Tank
C. Electric Engine Cooling Fan
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CAUTION:
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An electric engine cooling fan under the
hood can start up even when the engine
is not running and can injure you. Keep
hands, clothing, and tools away from any
underhood electric fan.
If the coolant inside the coolant recovery tank is
boiling, do not do anything else until it cools down.
The vehicle should be parked on a level surface.
When the engine is cold, the coolant level
should be at or above the COLD FILL line. If it is
not, you may have a leak at the pressure cap
or in the radiator hoses, heater hoses, radiator,
water pump, or somewhere in the cooling system.