04 lade, 2wd 5.3. parents truck has been saying for past months "service tire monitor" as you prob know this doesnt tell me which one. also being an 04, it doesnt directly tell me which tire has which air psi. So i ask is there something i can do to fix this or some type of procedure with tires or something. thanks

 

that may be one that you need to let tire pressure down on all four tires, and then inflate to desired pressure.... then reset your dic.... lets see if we can get slowroll, or stomper in on this one for ya....
rickyd