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2000 GMC Sierra 2500 Question: 2000 GMC 2500 6.0, it has a rough idle but not all the time. Replaced MAF. Help!

 

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Moosedrool, Wasilla, AK, January 31, 2012, 10:35
 Rookie

I haven't found a vaccum leak, cleaned IAC and it still shows codes 171/174.

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    Greg's Orange Auto (13041 Answers) , Orange, CA - (714) 361-9386
    globalhelper January 31, 2012, 12:29
     Master

    these codes are lean bank one and two could be fuel pressure, fuel filter,but try cleaning you mass air flow sensor 1st, this is a common problem

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