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

Power, Ground, Serial Data and Indicator Control


Object Number: 1241514  Size: FS
Master Electrical Component List
Brake Warning System Description and Operation
Switches
BRAKE, HTR/AC, and HVAC 1 Fuses
BRAKE, HTR/AC, and HVAC 1 Fuses
SP205 - 1 of 2
G110
Switches
Figure 2:

Switches


Object Number: 1241515  Size: FS
Master Electrical Component List
Brake Warning System Description and Operation
Supplemental Brake Assist
Power, Ground, Serial Data and Indicator Control
Power, Ground, Serial Data and Indicator Control
Power, Ground, Serial Data and Indicator Control
G104, G106, and G107
G104, G106, and G107
G104, G106, and G107
G104, G106, and G107
Figure 3:

Supplemental Brake Assist


Object Number: 1241517  Size: FS
Master Electrical Component List
Brake Assist System Description and Operation Vacuum Assist
Switches
B+ Bus Bar - 2 of 2
SBA, ETC/ECM, PCM 1, BTSI, and TRL B/U Fuses
SBA, ETC/ECM, PCM 1, BTSI, and TRL B/U Fuses
Vehicle Speed and Speedometer
G203 - 2 of 3
G203 - 1 of 3
G203 - 1 of 3
G200 - 1 of 3
G200 - 1 of 3
G200 - 1 of 3