Hey guys. The car is an 08. The battery died and when I charged it the tire pressure light came on on the dash. I assumed that the TPMS system needed to be relearned so attempted this but the car won't enter learning mode. I thought perhaps the key receiver also needed to be relearned, but I can't enter the remote jey learning mode either. Seems kinda like a catch-22 to me, I need the one to be atcive in order to relearn the other but they are both irresponsive.

Any ideas?

Thanks,
Isaac

 

You did start with -
Hummer off
Parking brake in
Turn key to aux (or on but not starting engine)
Twist exterior light switch to left and right about 4 times until horn beeps?

You would be in learning mode then

Edit: sorry this is info for h3 not sure if this works for h2

 

Atari thank you for the reply. For the H2 there are several different ways to enter learning mode.

You can do it through the DIC, using a Tech 2 or using the odometer/ trip button. I tried all three and get the the point where I am supposed to "hit the {check mark} to enter learning mode" and when I hit that button nothing happens.