Hi,
The bus to sniff is the vehicle bus : CAN4 / Body
On a 20 pin plug, pins 9 + 10.
The message to sniff could be ID 553 :
bits 12-13-14 : GearLeverPosition 4="Full Up", 3="Half Up", 2="Full Down", 1="Half Down", 0="Center" ;
bits 16-17 : GearLeverButton (don't know how to decode it).
An...