i have seen ebay sellers selling used tire pressure monitoring sensors but there 2 different types of part numbers they always show do not match the actual GM part number in anyway.

example sellers numbers are also for a 2007 GP >LKQ SKU: tmo - LKQ560
Tire Pressure Sensors FCC Number : kr5s120123007
Tire Pressure Sensors Part Number : m173ep2

but GM's number is 15921013

so i do not know 100% foresure if these ones being sold are the exact same match.

i guess for my 2007 GP , i need them for when i buy my winter steel rims. i think i was told either it was easier then switching my sensors from my summer aluminium rims to the steel rims and or it could nor be done ??