Review on 🚗 Enhance Towing Safety with GM Genuine Parts Trailer Brake Control Module Assembly - Model 20850923 by Shane Minter

So this module works as expected and the price is great. I even went for a cheaper used model and paid around $21. It's programmed to your VIN, otherwise you'll still get "Service Trailer Brake" messages on your DIC and/or no boost or manual shifting. If you're expecting to install and everything works right away, you're going to get frustrated. If you're trying to minimize the overall cost with the hardware already installed, this has worked for me. GM+plus charged $265 in the mail and my local Chevy service department charged $399 for repairs. I lost $89 using this product, SSR and a local tuner who programmed the module in 5 minutes.