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Larry Cooke

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    Sierra Denali

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  1. Finally got a answer. Broken push rod. #7 exhaust. Will replace push rod and lifters. No damage to the piston or valve. Thanks again for the help!
  2. Sorry for the long delay. Shop has been closed for the last 3 days. I'll check later today to see if he has found anything.
  3. Thanks again for all your help. I'll get it in the shop tomorrow and pull the valve cover. I'll let you know what I find.
  4. M Need help. I have a 2015 6.2 that's throwing a Po307 code. Misfire on #7.swapped out the coil, spark plug, and wire with cyl.3. Erased code on startup immediately set code again. Any thoughts on what's next. BTW it does have 103000 miles on the clock. TIA
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