Im New to this site as well as New to the Hummers...On my 07 H3 every day I drive my H3...Sooner or later the...Service TMP light comes on....I have checked ALL 4 tires to make sure they ALL have the same tire pressure with a digital tire guage and still...the light comes on daily....Any help with this answer????

 

The Tire Pressure Monitor (TMP) needs to be reset by the dealer. If there was an issue with the tire preasure, a "Low Tire" indicator would turn on.

I had to get mine reset when I changed my tires. 'Hope this helps!

 

What pressure do you have them set at?? Try exactly 38psi and if that does not do it, maketrip to the dealer where they can check and reset them.

 

I have them set at 35 psi BUt I will inflate them to 38 on all 4 and if it happens again,,,Ill go to the dealer in Tampa,Fl...I dont have a dealer close to me but thanks Doc and thanks Hummble..This Site really ROCKS for Newbies like me

 

It doesn't have to be reset by the dealer. There is a little song and dance you have to do. It is in the manual. If you don't want to do it, any tire shop should be able to do it for you for a fee (usually).

 

thanks,,,ill look in the manual cause Tampa is an HOUR away from me ONE WAY,,This forum ROCKS

 

True, you can reset the address codes, but the dealer can electronically scan them and detect a bad one, if there is a bad one?