GM Service Manual Online
For 1990-2009 cars only
Figure 1:

TCM and Transmission, Power, Ground, Serial Data, Inputs and Outputs


Object Number: 2174800  Size: FS
Figure 2:

NSBU Switch and TOSS Sensor


Object Number: 2174803  Size: FS
Figure 3:

TCM and Transmission, Power, Ground, Serial Data, Inputs and Outputs


Object Number: 2174807  Size: FS