There Is A Cooling System Pressure Tester Tool Kit. It Will Run Around $ 100.00 or More. Have A Good Radiator Shop Test It For You. Call First Most Will Be Able To Do This, Also They Can Give You Good Advice About The Leak.
radiator antifreeze coolant.
Find the source and repair it.
in the over flow tank
any vehicle that is water cooled and has a radiator needs antifreeze.
Compression test
How much antifreeze does a 1998 chevy mabilu ls take
It calls for dex-cool.
97 on up uses dex-cool coolant in its v6 engines
Dex-Cool
Compression ok?
Chevy did not build a Malibu in 1995.
Run a compression test. If compression in all cylinders is low, it's probably the timing chain.