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tdb729

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  1. tdb729
    I plan to do AFM delete, lifter and camshaft. I'm scheduled with my mechanic in 2 weeks. I only have the lifter tick when the AFM goes into V4 mode. V8 mode has no tick and no misfire. Just wondering if it's safe to drive a few miles a couple times the next two weeks if I keep it in V8 mode with no lifter tick by locking the trans in M5 which disables the V4 mode.
  2. tdb729
    I just had a lifter collapse, but the symptoms/knocking goes away if I drive in M5. Is it safe to drive it in M5 until my mechanic can get it in the shop to do the AFM delete, lifter and camshaft? 2015 GMC Sierra 5.3.
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