2003 GMC Envoy - Pt10 engine knock - vvt solenoid repair diy trailblazer raineer 4.2l 4x4 suv HD

I may have found a really easy way to diagnose the deep engine knock as a bad cam timing solenoid! 2003 GMC Envoy SUV 4x4 4.2L auto, similar to chevy trailblazer and buick raineer of same model year ranges.