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How to add coolant to the radiator – Buick 2004 Rainier User Manual

Page 324

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How to Add Coolant to the Radiator

1. You can remove the radiator pressure cap when

the cooling system, including the radiator pressure
cap and upper radiator hose, is no longer hot.
Turn the pressure cap slowly counterclockwise
about one full turn.

If you hear a hiss, wait for that to stop.
A hiss means there is still some pressure left.

2. Then keep turning the pressure cap. Remove the

pressure cap.

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