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

Power and Ground (Chevy/GMC)


Object Number: 564185  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
BCM (Chevy/GMC)
Ign ACC, RUN and RAP Bus Bar
AUX PWR, RDO BATT and HDLP SW Fuses
ILLUM and PARK LP Fuses
Vehicle Interface Unit (VIU) (Gen 1 - Dealer Installed)
w/o Trip Computer
Rear Seat Audio Control (Envoy)
Entertainment Connector End Views
G203 and G204 (Pickup)
Steering Wheel Controls Schematics
2000 S/T Headlight Leveling
AUX PWR, RDO BATT and HDLP SW Fuses
ILLUM Power (Pickup)
Handling ESD Sensitive Parts Notice
G200, G201, G203, G204, Park Position Switch and PCM/VCM
Powertrain Control Module Connector End Views
Handling ESD Sensitive Parts Notice
VCM Connector End Views
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 2:

BCM (Chevy/GMC)


Object Number: 564190  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Speakers (Regular Cab and Extended Cab w/ 3rd Door - Chevy/GMC)
Power and Ground (Chevy/GMC)
Body Control System Connector End Views
Handling ESD Sensitive Parts Notice
PCM/VCM, Data Link Connector (DLC) and Dimming Signal
PCM/VCM, Data Link Connector (DLC) and Dimming Signal
Entertainment Connector End Views
Handling ESD Sensitive Parts Notice
Figure 3:

Speakers (Regular Cab and Extended Cab w/ 3rd Door -- Chevy/GMC)


Object Number: 564192  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Speakers (Extended Cab w/o 3rd Door - Chevy/GMC)
BCM (Chevy/GMC)
Entertainment Connector End Views
Handling ESD Sensitive Parts Notice
Figure 4:

Speakers (Extended Cab w/o 3rd Door -- Chevy/GMC)


Object Number: 564195  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Speakers (Utility Except Envoy - Chevy/GMC)
Speakers (Regular Cab and Extended Cab w/ 3rd Door - Chevy/GMC)
Entertainment Connector End Views
Handling ESD Sensitive Parts Notice
Figure 5:

Speakers (Utility Except Envoy -- Chevy/GMC)


Object Number: 564209  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Remote Tape/CD Player (Chevy/GMC)
Speakers (Extended Cab w/o 3rd Door - Chevy/GMC)
Entertainment Connector End Views
Handling ESD Sensitive Parts Notice
Figure 6:

Remote Tape/CD Player (Chevy/GMC)


Object Number: 564214  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Amplifier Power and Ground (Chevy/GMC)
Speakers (Utility Except Envoy - Chevy/GMC)
Entertainment Connector End Views
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 7:

Amplifier Power and Ground (Chevy/GMC)


Object Number: 564228  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Amplifier Inputs (Chevy/GMC)
Remote Tape/CD Player (Chevy/GMC)
INT BATT Fuse
Entertainment Connector End Views
Handling ESD Sensitive Parts Notice
G205 and G208 (Envoy)
Except Envoy
Figure 8:

Amplifier Inputs (Chevy/GMC)


Object Number: 564230  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Amplifier, Left Channel Output (Chevy/GMC)
Amplifier Power and Ground (Chevy/GMC)
Entertainment Connector End Views
Handling ESD Sensitive Parts Notice
Entertainment Connector End Views
Handling ESD Sensitive Parts Notice
Figure 9:

Amplifier, Left Channel Output (Chevy/GMC)


Object Number: 564233  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Amplifier, Right Channel Output (Chevy/GMC)
Amplifier Inputs (Chevy/GMC)
Entertainment Connector End Views
Handling ESD Sensitive Parts Notice
Figure 10:

Amplifier, Right Channel Output (Chevy/GMC)


Object Number: 564235  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Rear Seat Audio Control (Envoy)
Amplifier, Left Channel Output (Chevy/GMC)
Entertainment Connector End Views
Handling ESD Sensitive Parts Notice
Figure 11:

Rear Seat Audio Control (Envoy)


Object Number: 564241  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Radio Power and Ground and Speakers (w/o Amplifier - Bravada)
Amplifier, Right Channel Output (Chevy/GMC)
Power and Ground (Chevy/GMC)
ILLUM and PARK LP Fuses
Entertainment Connector End Views
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
G205 and G208 (Envoy)
Envoy Only
Handling ESD Sensitive Parts Notice
Figure 12:

Radio Power and Ground and Speakers (w/o Amplifier -- Bravada)


Object Number: 564242  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Radio Power and Ground (w/ Amplifier - Bravada)
Rear Seat Audio Control (Envoy)
Ign ACC, RUN and RAP Bus Bar
AUX PWR, RDO BATT and HDLP SW Fuses
ILLUM and PARK LP Fuses
Body Control System Connector End Views
Handling ESD Sensitive Parts Notice
Power and Ground (w/ Trip Computer)
AUX PWR, RDO BATT and HDLP SW Fuses
ILLUM Power (Pickup)
Steering Wheel Controls Schematics
Outside Ambient Temperature Display Sensor (w/ Trip Computer)
Handling ESD Sensitive Parts Notice
G203 and G204 (Pickup)
Figure 13:

Radio Power and Ground (w/ Amplifier -- Bravada)


Object Number: 564247  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Remote Tape/CD Player (Bravada)
Radio Power and Ground and Speakers (w/o Amplifier - Bravada)
Ign ACC, RUN and RAP Bus Bar
AUX PWR, RDO BATT and HDLP SW Fuses
ILLUM and PARK LP Fuses
Body Control System Connector End Views
Handling ESD Sensitive Parts Notice
Power and Ground (w/ Trip Computer)
AUX PWR, RDO BATT and HDLP SW Fuses
AUX PWR, RDO BATT and HDLP SW Fuses
G203 and G204 (Pickup)
Steering Wheel Controls Schematics
Figure 14:

Remote Tape/CD Player (Bravada)


Object Number: 564249  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Amplifier Power and Ground and Inputs (Bravada)
Radio Power and Ground (w/ Amplifier - Bravada)
AUX PWR, RDO BATT and HDLP SW Fuses
AUX PWR, RDO BATT and HDLP SW Fuses
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
G203 and G204 (Pickup)
Figure 15:

Amplifier Power and Ground and Inputs (Bravada)


Object Number: 564256  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Amplifier, Left Channel Output (Bravada)
Remote Tape/CD Player (Bravada)
INT BATT Fuse
Handling ESD Sensitive Parts Notice
Except Envoy
Entertainment Connector End Views
Handling ESD Sensitive Parts Notice
Figure 16:

Amplifier, Left Channel Output (Bravada)


Object Number: 564260  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Amplifier, Right Channel Output (Bravada)
Remote Tape/CD Player (Bravada)
Handling ESD Sensitive Parts Notice
Entertainment Connector End Views
Figure 17:

Amplifier, Right Channel Output (Bravada)


Object Number: 564264  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Amplifier, Left Channel Output (Bravada)
Entertainment Connector End Views
Handling ESD Sensitive Parts Notice