GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Regal 🢒 Power and Signal Distribution 🢒 Data Communications 🢒 Radio/Navigation System Schematics
Figure 1:

Power, Ground and Serial Data
Object Number: 2179887 Size: FS
Figure 2:

Radio Faceplate
Object Number: 2179889 Size: FS
Figure 3:

Navigation Faceplate
Object Number: 2179893 Size: FS
Figure 4:

Door Speakers and Center Speaker
Object Number: 2179894 Size: FS
Figure 5:

Amplifier (1 of 2)
Object Number: 2179897 Size: FS
Figure 6:

Amplifier (2 of 2) (UQS)
Object Number: 2179898 Size: FS
Figure 7:

Front Speakers (UQS)
Object Number: 2179899 Size: FS
Figure 8:

Rear Speakers (UQS)
Object Number: 2179901 Size: FS
Figure 9:

Radio Antennas
Object Number: 2179903 Size: FS
Figure 10:

Redundant Radio Controls - Steering Wheel Controls
Object Number: 2179906 Size: FS
Figure 11:

Redundant Radio Controls - Tunnel Module Controls
Object Number: 2179907 Size: FS