GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Body and Accessories 🢒 Horns 🢒 Horn Component Views
Figure 1:

Front Bottom of Vehicle
Object Number: 826951 Size: LF
(1)Inflatable Restraint Front End Discriminating Sensor Connector
(2)Inflatable Restraint Front End Discriminating Sensor (AJ3/AK5)
(3)Horns
Figure 2:

On The Steering Wheel/Column
Object Number: 826812 Size: LF
(1)Turn Signal/Multifunction Switch (Cruise Control ON/OFF, Resume/Accel and Set/Coast Switches (K34), Headlamp Dimmer Switch, Turn Signal Switch, Windshield Wiper and Windshield Washer Switches)
(2)Horn Switch Ground Contact