Hey Guys,
I just read my owners manual (last resort, right?!) for my 2019 Silverado 1500 and I agree with Trwtow, there is a manual method of programming the trailer TPMS components by increasing or decreasing the tire air for 10 seconds. I'll be doing this later this week. It also says that the trailer must be electrically hooked up to the truck. This is a great feature of the Chevy's! My truck also has the trailer brake gain factory installed and THAT is also an excellent feature!
Side note, I've hauled close to the gross max weight (14,800 lbs) up and down mountains from NC to South Dakota and it performed flawlessly! Cruising at 70 and rpm's about 1800! Fuel mileage average was 10-12, not good BUT it got the job done. I didn't have leveling bags and wished I had. I ended up having those installed once I arrived in SD.