I made the WRONG CALL? (Wiring Variables - How to Test INTEGRITY)

A local shop called me in for two GM vehicles that have some WEIRD electrical issues after visiting the body shop.
2020 GMC Denali: Side Object Detection System is OFFLINE after rear-end work.
2015 Chevy Equinox has TPMS and Keyless Entry problems after a ROOF REPLACEMENT?
Body shop vehicles always present interesting variables...
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Enjoy!
Ivan