With sensors in-hand, you can program sensors using the Bosch EL-52641 Trailer Presence Simulator Tester. Dealer should have one...maybe. You can get through Kent Moore Tool, and is pricey. I also purchased the VXDAS TPMS Relearn Tool from Amazon. $12.99. It is crazy why this is such an issue when GM dealerships and trailer wheel manufacturers have no idea what options are available. FYI - listed as 23 feet maximum from rear of truck to furthest trailer wheel (basically a 40 foot 5th wheel).
https://techlink.mynetworkcontent.com/wp-content/uploads/2019/02/GM18-460.pdf
