GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Lucerne 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Radio/Navigation System Schematics
Figure 1:

Radio Power and Ground
Object Number: 2081256 Size: SH
Figure 2:

Amplifier (UQA)
Object Number: 2081260 Size: FS
Figure 3:

Speakers (UQA)
Object Number: 2081262 Size: FS
Figure 4:

Speakers (UQ3)
Object Number: 2081263 Size: FS
Figure 5:

Radio (without UE1)
Object Number: 2081265 Size: FS