1996 GMC Savana Van Owner's Manual - Page 246

NOTICE: ~~ Checking Coolant If you usean improper coolant mix, your engine could overheatand be badly damaged. The repair cost wouldn't be covered by your warranty. Too much waterin 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. I NOTICE: If you usethe proper coolant, you don't have to add extrainhibitors or additives which claim to improve the system. These be harmful. can When your engine is cold, the coolant level should be at FULL COLD, or a little higher. 6-22