Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 2010 GMC AFM lifter failelure. Replaced, still misfiring. › Reply To: 2010 GMC AFM lifter failelure. Replaced, still misfiring. April 18, 2020 at 4:00 am #954338 Richard KirshyParticipant I would proceed with a compression test, if that all shows good try to resolve your EVAP issues.