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

Right Front Frame Rail, Near Fender


Object Number: 589597  Size: LF
(1)Horn Assembly
Figure 2:

Steering Wheel and Column


Object Number: 588967  Size: LF
(1)Inflatable Restraint Driver Inflator Module
(2)Horn Connector -- Spring Loaded Contact
(3)Inflatable Restraint Driver Inflator Module Harness Connector