ok so I was told by a friend that I should check the PCV and hoses, along with the CTS, he said that these engines are prone to over heating and you want the CTS 100% perfect, and that the PCV valve should be done at least twice in the cars life. Is he correct?

The PCV valves rarely fail - usually they just need the hoses and coupler's cleaned out and the valve soaked in some carb cleaner. I almost never replace them although they are cheap - they should only be bought from the dealer due to spring-rate variations that have been experienced with aftermarket one's - causing oil consumption.

 

The CTS has nothing at all to do with overheating - it control fuel mixture for the SPFI computer. When they fail it will cause hard starting in the cold or will cause the engine to run rich when warm - depending on the type of failure. They cannot cause overheating on their own. They don't fail that often and they are easily checked against the spec with a DMM.

 

GD

hummm..it could be why its a little tough to start in the morning, it will with the first crank but it is slow, could just need a new batt for the startup juice.