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

Horns - Low/High Note


Object Number: 826091  Size: LF
(1)Horn - Low Note
(2)Horn - High Note
(3)Horn Connector - High Note
(4)Forward Lamp Harness
Figure 2:

Steering Wheel and Column


Object Number: 856748  Size: LF
(1)Steering Wheel Control Switch Assembly - Upper Left
(2)Passlock Sensor Connector
(3)Ignition Key Alarm Switch
(4)Ignition Lock Cylinder Control Actuator
(5)Ignition Lock Cylinder Control Actuator Connector
(6)Ignition Switch
(7)Ignition Key Cylinder
(8)Steering Wheel Control Switch Assembly - Upper Right
(9)Horn Switch
(10)Steering Wheel Control Switch Assembly - Lower Right
(11)C277
(12)Steering Wheel Control Switch Assembly - Lower Left
(13)Turn Signal/Multifunction Switch