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

Power, Ground, Serial Data, and Antenna Module
Object Number: 2081326 Size: FS
Figure 2:

Speakers (UW6)
Object Number: 2081328 Size: FS
Figure 3:

Radio to Amplifier (U88)
Object Number: 2081331 Size: FS
Figure 4:

Front Speakers (U88)
Object Number: 2081333 Size: FS
Figure 5:

Rear Speakers (U88)
Object Number: 2081336 Size: FS
Figure 6:

Satellite Radio (U2K)
Object Number: 2081337 Size: FS