on a 2000 Malibu it is on passengers side under alternater 3.1 v6, follow hose from ac you will find it.
in the Chevy Malibu forum
location of ecm on 1998 Chevrolet Malibu
Where is located pressure sensor on Chevy Malibu 1999
where is the electric power steering pump loca ted on a 2005 chevy malibu 3.5 liter engine
the system is probably out of coolant.
if u look from the driver side it is directly behind the engine it has a blue cap on it almost right behind the belt. so the easiest way to get to it will be fro the passenger side but the way to see it and locate it is from the drivers side
locate the top radiator hose.then follow it to the engine. the housing it attaches to under it is where the thermostadt is at.
2001 malibu with3.1 fuel presser Regultar
check your fuel pressure.
Fuel pressure test.