Truck Forums - Misfires

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Lh155

11-10-2020 04:50 PM

Misfires

I have a 2001 GMC Sierra 1500 SLE Extended CAB 4.8 L V8. She rides weak and I cannot figure out the problem with the misfires. They go from one cylinder to the next 🤷🏻‍♂️. Says 8 I change 8 then it goes to 7. Oh I have over 300k miles on the truck. HELP PLEASE

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