GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2006 🢒 Express 🢒 Vehicle Control Systems 🢒 Computer/Integrating Systems 🢒 Body Control System Schematics
Figure 1:

Power, Ground, Serial Data, and Controlled/Monitored Subsystem References
Object Number: 1569787 Size: FS
Master Electrical Component List
Body Control System Description and Operation
Control Module References
Lighting Subsystem References
B+ Bus - Underhood Fuse Block - Gas
BRK, CRNK, FRT WPR, HVAC, IGN 1, TBC ACCY and TBC/TCM ACCY Fuses
Horns
Keyless Entry
Ignition Switch - ACCY/RUN, RUN/START Bus Bars and IGN B Fuse
BRK, CRNK, FRT WPR, HVAC, IGN 1, TBC ACCY and TBC/TCM ACCY Fuses
Audible Warnings
Brake Warning System
Power, Ground, DLC, and Splice Pack SP200
G303
Lock and Unlock Control
Switches
Access Panel Relay Control
Theft Deterrent
PNP Switch, Tow/Haul Switch, Serial Data, and Indicator
PNP Switch, Tow/Haul Switch, Serial Data, and Indicator
Pressure Controls, Tow/Haul Switch, Temperature, and Speed Sensors
Figure 2:

Lighting Subsystem References
Object Number: 1569790 Size: FS
Master Electrical Component List
Body Control System Description and Operation
Control Module References
Power, Ground, Serial Data and Controlled/Monitored Subsystem References
Courtesy Lamps (w/o YF7) - 1 of 2
Courtesy Lamps (YF7)
Dome Fluorescent Work Lamps - PRP (UF2)
I/P Dimming Supply Voltage - 1 of 3 and LED Dimming Supply Voltage
Dome and Courtesy Lamp Switch Signals and Door Latch Assemblies
Underhood/Vanity Lamps and Door Jamb Switches
Backup Lamps and Trailer Wiring
Inside Rearview Mirror Schematics
Fog Lights
Headlamps
Daytime Running Lamps (DRL)
Hazard and Turn Signal Switches
Dome and Courtesy Lamp Switch Signals and Door Latch Assemblies
I/P Dimming Supply Voltage - 1 of 3 and LED Dimming Supply Voltage
Park Lamp Relay Control and Front Park Lamps