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

Brake Pressure Differential Switch


Object Number: 954587  Size: MF
(1)Brake Pressure Differential Switch
(2)C110 (Engine Harness to Brake Pressure Differential Switch Harness)
Figure 2:

Left Front Interior Wiring


Object Number: 582024  Size: LF
(1)C200
(2)S240
(3)S200
(4)S201
(5)C223
(6)C202
(7)Inflatable Restraint I/P Module
(8)Auxiliary Power Outlet Front #1 Connector
(9)Auxiliary Power Outlet Front #2 Connector
(10)Cigar Lighter Connector
(11)S234
(12)Engine Cover Ground (G201)
(13)Inflatable Restraint Sensing and Diagnostic Module
(14)Inflatable Restraint Sensing and Diagnostic Module Connector
(15)C333
(16)S242
(17)C300
(18)S325
(19)Center High Mounted Stop Lamp (CHMSL) Resistor
(20)S326
(21)S324
(22)S327
(23)Park Brake Switch
(24)S303
(25)S330
(26)S246
(27)S305
(28)S246