GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2006 🢒 Express 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 Antilock Brake System Schematics
Figure 1:

Power, Ground, Serial Data, Indicator, and Stop Lamp Switch (w/o JL4)
Object Number: 1566599 Size: FS
Master Electrical Component List
ABS Description and Operation (W/O JL4)
Control Module References
Wheel Speed Sensors and VSS (w/o JL4)
Ignition Switch - ACCY/RUN/START, RUN, START Bus Bars and IGN A Fuse
Ignition Switch - ACCY/RUN, RUN/START Bus Bars and IGN B Fuse
AIRBAG, IGN E, ISRVM, SPARE and TBC IGN 1 Fuses
Ignition Switch - ACCY/RUN, RUN/START Bus Bars and IGN B Fuse
Power, Ground, DLC, and Splice Pack SP200
Controlled/Monitored Subsystem and Transmission References
Fuel Controls - EVAP and Device Controls
Controlled/Monitored Subsystem References
Gas - w/o JL4
Figure 2:

Wheel Speed Sensors and VSS (w/o JL4)
Object Number: 1566600 Size: FS
Master Electrical Component List
ABS Description and Operation (W/O JL4)
Control Module References
Power, Ground, Serial Data, Indicator, VSS, and Stop Lamp Switch (JL4)
Power, Ground, Serial Data, Indicator, and Stop Lamp Switch (w/o JL4)
Antilock Brake System Schematic Icons
Antilock Brake System Schematic Icons
Figure 3:

Power, Ground, Serial Data, Indicator, and Stop Lamp Switch (JL4)
Object Number: 1566602 Size: FS
Master Electrical Component List
ABS Description and Operation (W/JL4)
Control Module References
Wheel Speed Sensors (JL4)
Wheel Speed Sensors and VSS (w/o JL4)
Ignition Switch - ACCY/RUN, RUN/START Bus Bars and IGN B Fuse
AIRBAG, IGN E, ISRVM, SPARE and TBC IGN 1 Fuses
Ignition Switch - ACCY/RUN/START, RUN, START Bus Bars and IGN A Fuse
B+ Bus - Body Fuse Block
B+ Bus - Body Fuse Block
B+ Bus - Underhood Fuse Block - Gas
Steering Wheel/Speed Position Inputs, Traction Control Switch, and Precharge Pump (JL4)
Power, Ground, DLC, and Splice Pack SP200
Gas - JL4
Figure 4:

Wheel Speed Sensors and VSS (JL4)
Object Number: 1566604 Size: FS
Master Electrical Component List
ABS Description and Operation (W/JL4)
Control Module References
Yaw and Lateral Acceleration Sensor Inputs (JL4)
Power, Ground, Serial Data, Indicator, VSS, and Stop Lamp Switch (JL4)
Antilock Brake System Schematic Icons
Antilock Brake System Schematic Icons
Antilock Brake System Schematic Icons
Antilock Brake System Schematic Icons
Antilock Brake System Schematic Icons
Antilock Brake System Schematic Icons
Figure 5:

Yaw and Lateral Acceleration Sensor Inputs (JL4)
Object Number: 1566605 Size: FS
Master Electrical Component List
ABS Description and Operation (W/JL4)
Control Module References
Steering Wheel/Speed Position Inputs, Traction Control Switch, and Precharge Pump (JL4)
Wheel Speed Sensors (JL4)
Figure 6:

Steering Wheel/Speed Position Inputs, Traction Control Switch, and Precharge Pump (JL4)
Object Number: 1566606 Size: FS
Master Electrical Component List
ABS Description and Operation (W/JL4)
Control Module References
Yaw and Lateral Acceleration Sensor Inputs (JL4)
Ignition Switch - ACCY/RUN, RUN/START Bus Bars and IGN B Fuse
BTSI, BTSI BCK/UP, ECM/TCM/GLOW PLUG CNTRL MDL IGN 1, FUEL HTR, O2 SNSR A, O2 SNSR B, PCM IGN 1, SPARE and TRLR BCK/UP Fuses
BTSI, BTSI BCK/UP, ECM/TCM/GLOW PLUG CNTRL MDL IGN 1, FUEL HTR, O2 SNSR A, O2 SNSR B, PCM IGN 1, SPARE and TRLR BCK/UP Fuses
Power, Ground, Serial Data, Indicator, VSS, and Stop Lamp Switch (JL4)
I/P Dimming Supply Voltage - 1 of 3 and LED Dimming Supply Voltage
G303
G304