2020 Silverado 5.3l runs rough

[DMB]

Changed convertors and o2 sensors. Pretty straightforward and now numerous misfires, surging pretty much limp mode. Put old o2’s back in same problem. 2020 5.3l

Edited February 15, 2025 by DMB

[GMCustomerService]

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[silveradosid]

did you have codes 420 and 430, those are the codes for converters. but those codes can also be triggered by other problems which you may have had before. exhaust leaks will trigger those codes, so will a dirty maf sensor. you didn't post mileage, but may need the throttle body cleaned. you need to get it scanned or buy a good scanner to really know whats going on