you think that could be why my mileage blows donkee nutz

 

Well...I increased all the tires including the spare to 38psi and the warning was off (serv tpm) so all was good untill i went out last night and was on the highway again for about the same amount of time 20-30 min and the warning came back. It seems it only comes on when on the highway or at higher consistant speeds its not tire pressure and the tires are warm? any new thoughts?

 

I would try to reset all the sensors as if you put on a new set of tires. It's in the manual. You know let air out of LF tire for 10 seconds, wait for horn honk, knock three times on the ceiling......Maybe that will resolve your error. I did the routine when I put on the winter treads, it beats paying the dealer to do it.

 

I did put on new tires, but i was told as long as they are put back in the same place as the were taken off from that the reprogaming was not needed. Maybe it is ?

 

as long as sensor FL (front Left) goes back into FL..and so on then you will not need to recalibrate the system...but it would be worth a shot anyway...like all computers the tps may just need to reboot.

 

called the dealer on the problem he had said ANY time the tires are removed from the truck even if they are put back in the same position they need to be reprogramed/rebooted. So I guess i'll try that before my roadtrip today..

 

I rotated my tires today and I got the same thing. I did what the owners manual says to do and it didn't work. is it some thing the dealer has to do?

 

no, unlike the old style that the vette's and caddies had on them that the dealer had to recalibrate, the H3's system is simple and pretty straight forward. You do have a time frame that it must be done by or else it won't take. Once you start the process of recalibrating I think you have like 5 or ten minutes to complete it.

 

Yeah it gives you five min total, I did it twice and it still shows up on the dash. does this always happen after tire rotation?

 

It does not work ...The dealer said whenever the tires come off the truck even if the go back in the same spot the need to be reprogramed. He also said my "serv tpm" light was on because i took the tires off and changed the tire size and one or more of the sensors is not reading correctly.