2010-2011 Cadillac Escalade Active Fuel Management (AFM) Engine, Valve Lifter Tick Noise at Start Up When Engine Has Been Off for 2 Hours or More

download Condition Some customers may comment on an engine valve lifter tick noise that occurs after the engine has been shut off for at least two hours. The tick noise may last from two seconds to ten minutes. Cause This condition may be caused by any of the following: • Aerated oil in the valve [...]