I’m going be changing my tires this winter, thinking it’s a good idea to change the TPMS sensors. 2019 RM with the original sensors! I went back to look for the old threads that had part numbers for the cheap Chinese replacement versions and the GM program tool! I’m confused about what’s what with this!!! Seems you can’t get cheap replacements anymore? Did they make a change? Do I need to bite the bullet and pay the ridiculous 139.99 ea? Can I program it myself or do I have to use and pay the dealer?