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breed

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  1. Did this ever get worked out? Just bought a brand new GMC Sierra 1500 AT4 with the 6.2 . Heard this right after I brought it home and started it in my garage. Now, it's all I can hear! Took it to the dealer a couple days ago, they said they couldn't replicate it or hear it. Does this mean we'll have imminent lifter issues?
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