I purchased a 2007 Yukon Denali and it came with the 18" Rims/Tires. I wanted to upgrade to the 20" CK945 from GM Accessories. I have been told that I need to install the TPM Sensors 19155710. My question is can I walk through the Learning Mode from the vehicles on board computer that is mapped out in the owner's manual? The dealer has quoted me a price of $700 to relearn the new sensors, that's seems way too steep. Do I need the dealer, or could a do-it-yourself person work? "ANY" help is appreciated.