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

TAC Motor, APP Sensor, On/Off Switch and Stop Lamp Switch - 4.2L Only


Object Number: 863249  Size: FS
Figure 2:

TAC Module, TAC Motor, APP Sensor, On/Off Switch and Stop Lamp Switch - 5.3L Only


Object Number: 863252  Size: FS
Figure 3:

ECBM and Vehicle Speed Signal


Object Number: 863254  Size: FS