The table shows wiring between OBD diagnostic port and Carberry main connector.

OBD CarberrySignal Function
1 19 GMLAN Radio, Steering Wheel…
2
3
4 2 GND Chassis Ground
5 2 GND  Signal Ground
6 10 CAN-H Engine
7
8
9
11
12
13
14 11 CAN-L Engine
15
16 1 +12V Battery (Unswitched)