1996 Pontiac Grand Prix Owner's Manual - Page 249

NOTICE: Ifyos we an improper coolant mix,your engine could overheat and be badly damaged. The repair cost wouldn'tbe covered by your warranty. Too much water in the mix can freeze and crack the engine, radiator, heater core and other parts. If you have to add coolant more than four times a year, have your dealer check your cooling system. Checking Coolant I NOTICE: If you usethe proper coolant, you don't haveto add extra inhibitors or additives which claim to improve the system. These can' be harmful. When your engine is cold, the coolant level should be at the COLD m q k or a little higher. When your engine is warm, the level should be up to the HOT mark or a little higher.