1991 Chevy Z71

Discussion in 'Member Introductions' started by My 91 Chevy, Jan 31, 2014.

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  1. My 91 Chevy

    My 91 Chevy New Member

    Had my truck throw codes 42 and 43 not sure with its is . Or what to do or test and replace . Any help with this would be great . Thanks

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