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

Heated Steering Wheel (4-Spoke)


Object Number: 1530195  Size: LF
(1)Steering Wheel
(2)Heated Steering Wheel Module (NR7/N31)
Figure 2:

Heated Steering Wheel (3-Spoke)


Object Number: 1845279  Size: LF
(1)Steering Wheel Controls - Left
(2)Steering Wheel Controls - Right
(3)Horn Switch
(4)Heated Steering Wheel Module (NR7/N31)
Figure 3:

Steering Column and Wheel (3-Spoke)


Object Number: 1488567  Size: LF
(1)Telescoping Actuator
(2)Steering Angle Sensor
(3)Turn Signal/Multifunction Switch
(4)Windshield Wiper/Washer Switch Assembly
(5)Steering Wheel Controls Seek Button (Part of the Steering Wheel Control Switch Assembly)
(6)Steering Wheel Controls Volume Button (Part of the Steering Wheel Control Switch Assembly)
(7)C277
(8)Horn Switch Connector
(9)Heated Steering Wheel Module
(10)Steering Wheel Controls Mute/Source Button (w/o NR7/N31), Heated Steering Wheel Button (NR7/N31) (Part of the Steering Wheel Control Switch Assembly)
(11)Steering Wheel Controls Voice/Preset Button (Part of the Steering Wheel Control Switch Assembly)
(12)Heated Steering Wheel (NR7/N31)
(13)Tilt/Telescope Switch
(14)Tilt Actuator
(15)C202
(16)Steering Column Lock Control Module (UA2)