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

Power and Ground


Object Number: 544120  Size: FS
Body Control Module Components
Body Control System Circuit Description
VCM/PCM and Data Link Connector (DLC)
B+ Bus Bar
Power and Grounding Connector End Views
PARK LP, ILLUM Fuses, Park Lamp and Headlamp Grounding Relays
IGN C, IGN A Fuses and Ignition and Start Switch
RAP, IGN B Fuses and Ignition Switch
Power
Power
HVAC and CRUISE Fuses
Body Control System Connector End Views
Handling ESD Sensitive Parts Notice
G200, G201 and G207
Figure 2:

VCM/PCM and Data Link Connector (DLC)


Object Number: 544121  Size: FS
Body Control Module Components
Body Control System Circuit Description
Horn Relay
Power and Ground
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
VCM Connector End Views
Handling ESD Sensitive Parts Notice
SP201 (2.2L)
Body Control System Connector End Views
Handling ESD Sensitive Parts Notice
Transfer Case Control Connector End Views
Entertainment Connector End Views
Handling ESD Sensitive Parts Notice
Figure 3:

Horn Relay


Object Number: 544122  Size: FS
Body Control Module Components
Body Control System Circuit Description
RAP Fuse, and Relay and Passlock ™ Sensor
VCM/PCM and Data Link Connector (DLC)
Power and Grounding Connector End Views
Body Control System Connector End Views
Turn Signal Lamps (Front) and Turn Signal Fuses (Rear)
Figure 4:

RAP Fuse, and Relay and Passlockā„¢ Sensor


Object Number: 544123  Size: FS
Body Control Module Components
Body Control System Circuit Description
VCM/PCM Speed Signal and Ambient Light Sensor
Horn Relay
B+ Bus Bar
Power and Grounding Connector End Views
RAP, IGN B Fuses and Ignition Switch
RAP Relay and Ignition Switch
Body Control System Connector End Views
Handling ESD Sensitive Parts Notice
Figure 5:

VCM/PCM Speed Signal and Ambient Light Sensor


Object Number: 544125  Size: FS
Body Control Module Components
Body Control System Circuit Description
Door Lock/Unlock Relays
RAP Fuse, and Relay and Passlock ™ Sensor
Body Control System Connector End Views
Handling ESD Sensitive Parts Notice
Cruise Control Module and PCM/VCM
VCM Connector End Views
Power
Handling ESD Sensitive Parts Notice
Powertrain Control Module Connector End Views
Cruise Control Module and PCM/VCM
Handling ESD Sensitive Parts Notice
ILLUM, RDO IGN and RDO BATT Fuses and VSS Signal
G200, G201 and G207
Ground
Figure 6:

Door Lock/Unlock Relays


Object Number: 544127  Size: FS
Body Control Module Components
Body Control System Circuit Description
Ignition Key Alarm Switch
VCM/PCM Speed Signal and Ambient Light Sensor
Body Control System Connector End Views
Handling ESD Sensitive Parts Notice
Relay Control and Door Lock Actuators
INT BATT, PWR LKS, CTSY LP and CIGAR LTR Fuses
G200, G201 and G207
Relay Control and Door Lock Actuators
Relay Control and Door Lock Actuators
G200, G201 and G207
Figure 7:

Ignition Key Alarm Switch


Object Number: 544130  Size: FS
Body Control Module Components
Body Control System Circuit Description
Side Door Jamb Switches
Door Lock/Unlock Relays
Body Control System Connector End Views
Handling ESD Sensitive Parts Notice
G200, G201 and G207
Figure 8:

Side Door Jamb Switches


Object Number: 544133  Size: FS
Body Control Module Components
Body Control System Circuit Description
Headlamp Switch, Inadvertent Power Relay and Courtesy Lamp Relay
Ignition Key Alarm Switch
Body Control System Connector End Views
Handling ESD Sensitive Parts Notice
G203 and G204
Figure 9:

Headlamp Switch, Inadvertent Power Relay and Courtesy Lamp Relay


Object Number: 544135  Size: FS
Body Control Module Components
Body Control System Circuit Description
DRL, HDLP PWR and HDLP GND Relays
Side Door Jamb Switches
DRL, HDLP PWR and HDLP GND Relays
Park, Marker, License and Turn Signal Lamps (Rear)
G203 and G204
ILLUM Fuse 12
Inadvertent Power Relay, IP Compartment and Underhood Lamps
AUX PWR, RDO BATT, HDLP SW Fuses and Inadvertent Power Lamp Relay
Inadvertent Power Relay, IP Compartment and Underhood Lamps
CTSY LP Fuse, Courtesy Lamp Relay and Courtesy Lamps
G200, G201 and G207
Body Control System Connector End Views
Handling ESD Sensitive Parts Notice
Figure 10:

DRL, HDLP PWR and HDLP GND Relays


Object Number: 544139  Size: FS
Body Control Module Components
Body Control System Circuit Description
LT TURN, RT TURN Fuses and Instrument Cluster
Headlamp Switch, Inadvertent Power Relay and Courtesy Lamp Relay
B+ Bus Bar
G102
Power and Grounding Connector End Views
Headlamp Grounding Relay and Flash-to-Pass Switch
G200, G201 and G207
Headlamp Grounding Relay and Flash-to-Pass Switch
Headlamp Grounding Relay and Flash-to-Pass Switch
Headlamp Grounding Relay and Flash-to-Pass Switch
Headlamp Switch, Inadvertent Power Relay and Courtesy Lamp Relay
Body Control System Connector End Views
Handling ESD Sensitive Parts Notice
Figure 11:

LT TURN, RT TURN Fuses and Instrument Cluster


Object Number: 544141  Size: FS
Body Control Module Components
Body Control System Circuit Description
PARK LP, FOG LP Fuses, and Park Lamp and Fog Lamp Relays
DRL, HDLP PWR and HDLP GND Relays
Body Control System Connector End Views
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
G203 and G204
Power and Grounding Connector End Views
Turn Signal Lamps (Front) and Turn Signal Fuses (Rear)
Figure 12:

PARK LP, FOG LP Fuses, and Park Lamp and Fog Lamp Relays


Object Number: 544144  Size: FS
Body Control Module Components
Body Control System Circuit Description
LT TURN, RT TURN Fuses and Instrument Cluster
Power and Grounding Connector End Views
B+ Bus Bar
PARK LP, ILLUM Fuses, Park Lamp and Headlamp Grounding Relays
ILLUM Fuse Power
B+ Bus Bar
Power and Grounding Connector End Views
Body Control System Connector End Views
Handling ESD Sensitive Parts Notice