1996 GMC Safari Owner's Manual - Page 211

1996 GMC Safari Manual

Page 211 highlights

How to Add Coolant tothe 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 until it first stops. (Don't press down while turning the pressure cap.) 2. Then keep turning the pressure cap, but now push down as you If you hear a hiss, wait for that to stop. A hiss means there is still some pressure left. 5-19

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