Here is a new question... I had the orginal 17s with the TPMS... its a 2005.. I have recently upgraded to the 20s LTZ Rims.. they also have the TPMS but now they dont measure the air pressure.. they guy that i got my tires from said i had to reset them.. I told him the way i did it before by the unlock and lock button and let the air out and he said there is another way since i changed rims.. i honestly dont think it matters with rim size but maybe i am missing something... the rims are from a 08 i believe..
pretty sure the sensors in your 05 are different than the ones in the 08 wheels. Swap the sensors, problem solved.