GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2004 🢒 Optra 🢒 Accessories 🢒 Entertainment 🢒 Radio/Audio System Schematics
Figure 1:

Radio (w/ RDS)
Object Number: 1372169 Size: FS
Master Electrical Component List
Radio (w/o RDS)
Underhood Fuse Block - BATT PWR, IGN 1 and IGN 2 Fuses, Ignition Switch, I/P Fuse Block - RADIO, IMMOBILIZER, DLC, AUTO A/C, HAZARD LAMPS, RKE, TCM, and REAR FOG/CRUISE Fuses
Underhood Fuse Block - BATT PWR, IGN 1 and IGN 2 Fuses, Ignition Switch, I/P Fuse Block - RADIO, IMMOBILIZER, DLC, AUTO A/C, HAZARD LAMPS, RKE, TCM, and REAR FOG/CRUISE Fuses
I/P Illumination (w/Dimming)
I/P Illumination (w/Dimming)
Figure 2:

Radio (w/o RDS)
Object Number: 1372170 Size: FS
Master Electrical Component List
Radio (w/ RDS)
Underhood Fuse Block - BATT PWR, IGN 1 and IGN 2 Fuses, Ignition Switch, I/P Fuse Block - RADIO, IMMOBILIZER, DLC, AUTO A/C, HAZARD LAMPS, RKE, TCM, and REAR FOG/CRUISE Fuses
Underhood Fuse Block - BATT PWR, IGN 1 and IGN 2 Fuses, Ignition Switch, I/P Fuse Block - RADIO, IMMOBILIZER, DLC, AUTO A/C, HAZARD LAMPS, RKE, TCM, and REAR FOG/CRUISE Fuses
I/P Illumination (w/Dimming)
I/P Illumination (w/Dimming)