GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC K Pickup - 4WD 🢒 Body and Accessories 🢒 Entertainment 🢒 Entertainment Component Views
Figure 1:

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

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 3:

Radio Speaker Jumper Harness
Object Number: 277996 Size: MF
(1)Radio
(2)Speaker Harness
(3)Turn/Hazard Flasher Wiring
Figure 4:

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