Thread: L99 lifter tick
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Old 11-19-2019, 03:48 PM   #5
Rock-It Man
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Drives: 2010 Camaro 2SS A6
Join Date: Jul 2010
Location: MA
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There was a TSB, and no, you're no longer covered under warranty.

This was a "feature" on millions of GM engines with a faulty AFM lifter design. There's an upgrade that you can have installed, but it will cost you over $2,000.

I can't attest to the longevity of engines without the fix, because I had mine replaced under warranty years ago.
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