GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Radio


Object Number: 2079540  Size: FS
Figure 2:

Speakers (UW6)


Object Number: 2079545  Size: FS
Figure 3:

Audio Amplifier


Object Number: 2079548  Size: FS
Figure 4:

Speakers (U61) 1 of 2


Object Number: 2079553  Size: FS
Figure 5:

Speakers (U61) 2 of 2


Object Number: 2079557  Size: FS
Figure 6:

Digital Radio


Object Number: 2079564  Size: FS
Figure 7:

Steering Wheel Controls


Object Number: 2079569  Size: FS