I am unable to complete the TPMS "relearn positions" function after rotating my tires. I am able to enter the relearn mode and get two horn beeps, but then nothing happens when I deflate or inflate the left front tire. Relearn eventually times out. Any one know the trick to making the procedure work?

Thanks.

 

What company makes you tpms and is it wireless?

 

Try starting at a different wheel. I know it will program out of sequence if you get a horn chirp but at least you'll know you have got a dud sensor in your LF. You can add or release pressure according to GM but i have always let it out.