I don't have them on my 1 tons... Brother in law has them on his F150 and his wifes tahoe... The idiot light is just that... air pressure for the factory tire is what they are set at, so for example if i run my snow tires on a set of non TPMs rims the light stays on, OR the fact that i run snow tires on less thatn 32lbs, usually around 25-28lbs for the wifes unloaded focus... Just another expensive part that isn't necessary when a little brains and a $10 ari pressure gauge in you rig would do.
