Cooling System
The cooling system allows the engine to maintain the correct working temperature.
3.9L Engine
A. Coolant Recovery Tank
B. Radiator Pressure Cap
C. Electric Engine Cooling Fans
4.6L Engine
A. Coolant Surge Tank with Pressure Cap
B. Electric Engine Cooling Fans
WARNING:
An electric engine cooling fan under the hood can
start up even when the engine is not running and
can cause injury. Keep hands, clothing, and tools
away from any underhood electric fan.
WARNING:
Heater and radiator hoses, and other engine parts,
can be very hot. Do not touch them. If you do, you
can be burned.
Do not run the engine if there is a leak. If you run
the engine, it could lose all coolant. That could
cause an engine fire, and you could be burned.
Get any leak fixed before you drive the vehicle.
Notice: Using coolant other than DEX-COOL® can
cause premature engine, heater core, or radiator
corrosion. In addition, the engine coolant could
require changing sooner, at 50 000 km (30,000 miles)
or 24 months, whichever occurs first. Any repairs
would not be covered by the vehicle warranty.
Always use DEX-COOL® (silicate-free) coolant in the
vehicle.
See also:
Maintenance I
• Change engine oil and filter. See Engine Oil. An Emission Control Service.
• Engine coolant level check. See Engine Coolant
(4.6L Engine) or Engine Coolant
(3.9L Engine).
• Windshield wa ...
Potential Issues
Some OnStar services are disabled
after five days. OnStar cannot
perform Remote Door Unlock or
Stolen Vehicle Assistance after the
vehicle has been off continuously
for five days. After five ...
Express Window Operation
Windows with an express-up or down feature allow the front windows to be lowered
or raised without holding the switch. Rear windows only have express-down. Pull
a window switch up or push it down ...