RepairPal Certified shops can diagnose and repair your 2018 Cadillac XT5. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Consult the owners manual for best results:
https://my.cadillac.com/content/dam/gmownercenter/gmna/dynamic/manuals/2018/Cadillac/XT5/2018-cadillac-xt5-owners-manual.pdf
I will say that based on what I see, you cannot deactivate it.