CHEVROLET 2010 Impala - Manual (Page 299)

4. Then fill the coolant recovery tank to the
COLD FILL line.
5. Install the coolant recovery tank cap and the
pressure cap. After a day or two of driving, when the
engine is cold, check the coolant level in the recovery
tank. If it is low, refill it to the COLD FILL line.
If the coolant in the recovery tank is constantly low,
you should have a dealer/retailer service department
inspect the vehicle for leaks.
Notice: If the pressure cap is not tightly installed,
coolant loss and possible engine damage may occur.
Be sure the cap is properly and tightly secured.
Engine Overheating
The vehicle has several indicators to warn of engine
overheating.
There is a coolant temperature gage and a warning light
on the instrument panel that indicate an overheated
engine condition. See Engine Coolant Temperature
Gage on page 4-30 Engine Coolant Temperature Gage
and Engine Coolant Temperature Warning Light on
page 4-30 Engine Coolant Temperature Warning Light.
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