How about the possibility that it could be a failed rocker arm? The GM arms are notorious about losing bearings in the roller trunion and causing a knock noise.
How about the possibility that it could be a failed rocker arm? The GM arms are notorious about losing bearings in the roller trunion and causing a knock noise.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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