cummings is not for the engine. it is my nick because that is what i do every time I see and use my CTD. now you get it heheheh.
Tire light is a light that pops up on the dash cluster and the light load button is on the center next to the jake brake button.

 

Gotcha ...

 

The G thread is what the G string is made out of I think!

 

Then you might want to lose the S . My wife would slap me if i said "ohhh baby i'm cummings"

 

combo of cummins and cumming hehehhe

 

Is that where that one massage place is??

 

the light you are talking about is the TPMS (tire pressure monitoring system) light and the whole system is a pain in the *** if you ask me. All cars made AUG 2007 and newer are required to have the system unless they are commercial vehicles ie dually's. you can learn all the programming procedures in the owners manual or the dealer should be able to give you some more insight. Oh by the way if/when you get a flat make sure you go to a tire shop that is qualified to handle TPMS.