Quote:
Originally Posted by carkrazy1987
Take video or audio of it and post up. Mileage on truck also please. Could be a bad lifter or afm lifter if u have dod. I can check for tsbs when I get back to work after lunch.
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AFM lifter would be my guess too. I've read numerous issues of people on the chevy/gm fourms, of people having lifter issues because of the dod. Many people choose to get a custom tune to delete the dod and it solving the issue.