FYI - This is a T43 pin out from a G8. Corvette similar....pin 7 for TUTD. CTS-V likely to use this schema (?). 1 & 4, and 2 & 5 are connected internally and generally only one wire is run to one terminal.
1 Battery Positive
2 Ground
3 P/N Signal
4 Battery Positive
5 Ground
6 Stop Lamp Switch Signal
7 Not Used
8 Not Used
9 TCM Accessory Wake Up Signal
10 HS GMLAN +ve OUT
11 HS GMLAN -ve OUT
12 Ignition 1 - 12V +ve
13 HS GMLAN -ve IN
14 HS GMLAN +ve IN
15 Not Used
16 Not Used
Interested in E67 pinouts too. Have seen them somewhere, but cant find again.