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You must take it to the dealership, the 2007 Cobalts from base LS model and up all have chips in their keys and unfortunately this is not something you can avoid going to the dealership....

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∙ 17y ago

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While the question doesn't make much sense, the secondary air injection system on a cobalt is fairly simple. If you could give an exact code the answer would be much easier to figure out.


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