2021 3500 dually HO Tradesman.
Sooo .... having successfully changed TPIS to TPMS I needed to change the TP thresholds. Following the link that
@DeepH20Driller posted I got right up to the 'enter 4 digit code' bit. I tried 0000 and 1111 but got this message
"Failed: Wrong request length or Invalid request format"
I disconnected and pulled the cable then switched off ignition and then started the engine just to make sure I didn't have a dash full of warning lights! To my surprise, the amber tire inflation warning lamp wasn't on any more where as it was after switching to TPMS (my fronts were below the factory threshold)
Did it work instantaneously despite the warning? Or is something else going on? Most folk seem to have to drive it several times to take effect so I'm suspicious!