GM V6: Timing Chains & Rich/Lean Codes - Part 1

Ahh the infamous GM 3.6L V6 with timing codes! It runs really poorly when warmed up, and setting 11 codes in the PCM. Obviously we suspect stretched timing chains, but how do we give the customer a complete detailed estimate on what parts need to be replaced? This is especially important when there are several existing problems with this car. I show my method of testing the VVT system, including the VVT phasers and oil control solenoids. LAUNCH X431 PRO: https://www.amazon.com/dp/B07FCDWZKW/?ref=exp_pinehollowautodiagnostics_dp_vv_d Enjoy! Ivan