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Engine stumble when hit and knock sensor codes
04 Yukon 5.3 flex. When I got this vehicle in Sept. last year they told me the cats needed replaced. I drove it home and anytime I pressed the accelerator pedal to the floor it would stumble and fall flat. Checked codes and it said knock sensors and fuel pressure regulator were bad. Nothing...- Jessnco
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- Replies: 12
- Forum: Engine & Drivetrain
