Chevrolet Silverado P Codes (Powertrain) P0400 - P0499 P0402

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1999 Chevy Silverado Code 0402,P0402

1999 CHEVROLET SILVERADO
My 1999 Silverado Is Showing Codes 0402 And P0402. My Manual Says It's The Catalyst Not Performing At Optimum Efficience Left Bank. I Can't...
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Asked by Jergen

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