GMC C1500 P Codes (Powertrain) P0100 - P0199 P0172

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1997 GMC C1500 Po172 And Po 175

1997 GMC C1500
I Keep Setting Both Bank 1 And Bank 2 Rich At The Same Time I Can Erase The Mil And Drive Non Stop And The Codes Will Never Show Up Except...
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Asked by cobra1

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