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1991 Chevy Z71

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

  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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