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Persistent P0420 and P0430
Hello All, I’ve been searching forever it feels with no luck. I bought a used 07 Tahoe with a flex fuel 5.3. 165k miles. Decent shape but as I look into it more, maintenance was sub par. It had P0430 and a bunch of EVAP codes when I got it. Replaced the cats since it was rattling. 4 new GM O2...- Cj6706
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- Replies: 44
- Forum: Engine & Drivetrain
