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

Radio Power, Ground, and Audio Amplifier


Object Number: 1429099  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Speakers
Fuse Block - Underhood Bus
BTSI/BCM/MIRROR, RADIO, RR WIPER, and WIPER Fuses
Interior Lights Dimming
Parking Lamps
BODY, FOG LAMP, IP BATT RT, LOCKS, POWER SEAT, and PREM AUDIO Fuses
Entertainment Schematic Icons
Entertainment Schematic Icons
G300 (1 of 3)
G191, G202, and G303
Figure 2:

Speakers


Object Number: 1429103  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Power, Ground, and Audio Amplifier