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

Power, Cruise Control Switch, and Stop Lamp Feed


Object Number: 862678  Size: FS
Master Electrical Component List
Cruise Control Description and Operation
Ground and Class 2 Serial Data
SBA, ETC/ECM, PCM 1, BTSI, TRL B/U
BRAKE, HTR/AC, HVAC I, CRUISE, 4WD
FLASH
BRAKE, HTR/AC, HVAC I, CRUISE, 4WD
Figure 2:

Ground and Class 2 Serial Data


Object Number: 862688  Size: FS
Master Electrical Component List
Cruise Control Description and Operation
Power, Cruise Control Switch, and Stop Lamp Feed
SP205 - 2 of 2
G104, G107
Gauges, VSS, Engine Oil Signals