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

Power, Front Speakers, and Antenna -- Oldsmobile


Object Number: 238550  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Radio/Audio Systems Schematics: Pontiac w/Remote Cassette
Defogger Schematics
Interior Lights Dimming Schematics
Exterior Lights Schematics
Power Distribution Schematics
Power Distribution Schematics
Handling ESD Sensitive Parts Notice
Figure 2:

Cassette Controls, Ground, and Rear Speakers


Object Number: 238548  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Radio/Audio Systems Schematics: Pontiac w/Remote Cassette
Radio/Audio Systems Schematics: Oldsmobile
Ground Distribution Schematics
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 3:

Power, Front Speakers, and Antenna -- Pontiac


Object Number: 238540  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Radio/Audio Systems Schematics: W/UQ3
Radio/Audio Systems Schematics: Pontiac w/Remote Cassette
Interior Lights Dimming Schematics
Exterior Lights Schematics
Power Distribution Schematics
Power Distribution Schematics
Handling ESD Sensitive Parts Notice
Figure 4:

Amplifier and Rear Speakers


Object Number: 238554  Size: FS
Entertainment Components
Radio/Audio System Circuit Description
Radio/Audio Systems Schematics: Pontiac w/Remote Cassette
Ground Distribution Schematics
Keyless Entry Schematics
Release Systems Schematics
Power Distribution Schematics