While idleing it runs rough it hesitates at take off and when excellerating on highway or just driving. It gets worse if you are running the air conditioner.

Begin by replacing the fuel filter and spark plugs (ACDelco only).

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Originally Posted by razby23

While idleing it runs rough it hesitates at take off and when excellerating on highway or just driving. it gets worse if you are running the air conditioner.

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Do the things that tx-gm recommended, but you could have a failing/weak ignition coil or a partially congested/clogged fuel injector(s).