GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C Pickup - 2WD 🢒 Engine 🢒 Engine Electrical 🢒 Entertainment Component Views
Figure 1:

Audio Amplifier
Object Number: 340135 Size: MF
(1)Shock Sensor
(2)Shock Sensor Connector
(3)Vehicle Communication Unit
(4)Heated Seat Switch Rear Connector
(5)Stereo Controller, Rear
(6)Stereo Controller, Rear Connector
(7)Auxiliary Power Connector, Rear Console
(8)CD Changer
(9)CD Changer Connector
(10)Audio Amplifier
(11)Audio Amplifier Connectors
(12)Sub Woofer Connector C304
(14)Sub Woofer
(15)C305
(16)Security LED
(17)Console Trim Cover
(18)Body Control Module
Figure 2:

Auxiliary Power and Stereo Controller
Object Number: 340111 Size: MF
(1)Shock Sensor
(2)Shock Sensor Connector
(3)Vehicle Communication Unit
(4)Heated Seat Switch Rear Connector
(5)Stereo Controller, Rear
(6)Stereo Controller, Rear Connector
(7)Auxiliary Power Connector, Rear Console
(8)CD Changer
(9)CD Changer Connector
(10)Audio Amplifier
(11)Audio Amplifier Connectors
(12)Sub Woofer Connector
(13)C304
(14)Sub Woofer
(15)C305
(16)Security LED
(17)Console Trim Cover
(18)Body Control Module C1, C2, and C3
Figure 3:

CD Changer
Object Number: 340133 Size: MF
(1)Shock Sensor
(2)Shock Sensor Connector
(3)Vehicle Communication Unit
(4)Heated Seat Switch Rear Connector
(5)Stereo Controller, Rear
(6)Stereo Controller, Rear Connector
(7)Auxiliary Power Connector, Rear Console
(8)CD Changer
(9)CD Changer Connector
(10)Audio Amplifier
(11)Audio Amplifier Connectors
(12)Sub Woofer Connector
(13)C304
(14)Sub Woofer
(15)C305
(16)Security LED
(17)Console Trim Cover
(18)Body Control Module C1, C2, and C3
Figure 4:

Radio Wiring
Object Number: 331838 Size: MF
(1)IP Harness
(2)Radio Connector, C2
(3)Radio Connector, C1
(4)Radio Connector, C3
Figure 5:

Rear Speakers
Object Number: 311431 Size: MF
(1)Rear Speaker Connector, RR
(2)Rear Speaker, RR
(3)Front to Rear Body Harness
(4)Rear Speaker, LR
(5)Rear Speaker Connector, LR
Figure 6:

Radio Speaker Jumper Harness
Object Number: 277996 Size: MF
(1)Radio
(2)Speaker Harness
(3)Turn/Hazard Flasher Wiring
Figure 7:

Rear Speakers (Regular Cab)
Object Number: 277993 Size: MF
(1)Left and Right Rear Speakers
(1)Left and Right Rear Speakers