2001 GMC Safari Owner's Manual - Page 233

2001 GMC Safari Manual

Page 233 highlights

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. 2. Then keep turning the pressure cap, but now push down as you turn it. Remove the pressure cap. Turn the pressure cap slowly counterclockwise until it first stops. (Don't press down while turning the pressure cap.) If you hear a hiss, wait for that to stop. A hiss means there is still some pressure left. See "Engine Compartment Overview" in the Index for more information on location. 5-15

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