Cooling System - Cadillac 2007 CTS Owner's Manual

Cooling System

When you decide it is safe to lift the hood, here is
what you will see:
3.6L V6 Engine shown, 2.8L V6 and 6.0L V8
Engines similar
A. Electric Engine Cooling Fans
B. Coolant Surge Tank and Pressure Cap
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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 surge tank is
boiling, do not do anything else until it cools down.
The vehicle should be parked on a level surface.
If the engine is warm or hot, the coolant level
should be at or above the FULL COLD/FROID line
on the side of the coolant surge tank. If the
engine is cold, the coolant level should be near
the FULL COLD/FROID line on the side of
the coolant surge tank. 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
else in the cooling system.