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

Steering Wheel


Object Number: 228451  Size: LF
(1)Positive Horn Cap Connector
(2)Steering Wheel Horn Cap-Switch
(3)Negative Horn Cap Connector
(4)Steering Wheel
(5)Steering Column
Figure 2:

Engine Harness, Right Front View


Object Number: 230819  Size: LF
(1)Horn-Low Note
(2)Horn-High Note