Reasons why some wireless charging 'don't work' in cars: https://bezalel.co/blogs/bezalel-blog/why-are-there-are-so-many-issues-with-in-car-wireless-charging-1
Solution for GMC, Chevy, and Cadillac Vehicles Wireless Charging
Problem with GM in-car Wireless Charger
The transmitter related to the in-built wireless chargers will not charge iPhone 8. BEZALEL has solution..
https://bezalel.co/blogs/bezalel-blog/iphone-8-solution-for-gmc-chevy-and-cadillac-vehicles-in-car-wireless-charger
This charge-receiving case for iPhones 6 or 7 works in a lot of GM trucks, https://bezalel.co/pages/latitude-universal-charging-case They came out with a magnetic mount that the case goes with, for holding up the phone and stay put on AC vent https://bezalel.co/pages/omnia-wireless-car-charger