Having problems with your 1999 Chevrolet Malibu ?
Locate Inlet heater hose
\015 Need to flush and fill cooling system\015
I'm guessing you have something like the prestone flush/fill kit. I have never had much luck with those. (They leak and get parts of your engine wet that really shouldn't get wet.) I just drain the coolant, refill with water run the engine with the heater on full blast for about 5 minutes, drain again, repeat untill clean water is coming out then drain and refill with pure antifreeze. Usually there is enough plain water left in the enigine after the last drain to get the mix about 50/50. You can check it with one of the float type testers to make sure it will handle the coldest temps for your region.
Repair Help & Product Troubleshooting for 1999 Chevrolet Malibu
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