I don't think they ever came with diesels, so any 5w30 will do well. If it does have a diesel then 15w40.
5w30
PF46 if 5.3.
5W30 oil.
5w30
Use any major brand 5W20 oil.
5W-30
10w-40.
SAE 10W30
87 octane
what kind of motor oil for 2008 malibu 2.4
Chevy does not use a fuel cutoff inertia switch.
Dexron 3