GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 Sierra - 4WD 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Radio/Navigation System Schematics
Figure 1:

Radio Power, Ground and Serial Data
Object Number: 2064642 Size: FS
Figure 2:

Amplifier (UQA) and Rear Seat Audio (UK6) Power, Ground and Serial Data
Object Number: 2064645 Size: FS
Figure 3:

Amplifier Inputs (UQA)
Object Number: 2064647 Size: FS
Figure 4:

Front Speakers (UQ3/UQ5)
Object Number: 2064651 Size: FS
Figure 5:

Rear Speakers (UQ3/UQ5)
Object Number: 2064655 Size: FS
Figure 6:

Front Speakers (UQA)
Object Number: 2064660 Size: FS
Figure 7:

Rear Speakers (UQA)
Object Number: 2064665 Size: FS
Figure 8:

Digital Radio Receiver (U2K)
Object Number: 2064675 Size: FS