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

Cellular Communication Components


Object Number: 1631577  Size: LF
(1)Cellular Microphone (UE1)
(2)Inside Rearview Mirror
(3)Onstar Button Assembly (UE1)
(4)Inside Rearview Mirror Lamps
(5)Antenna
(6)Cellular and Navigational Antenna (UE1/U2K)
(7)Remote Control Door Lock Receiver (RCDLR)(UE1)
(8)Vehicle Communication Interface Module (VCIM)(UE1)
Figure 2:

Entertainment Components


Object Number: 1631579  Size: LF
(1)Speaker - Left Tweeter
(2)Cellular Microphone (UE1)
(3)Steering Wheel Control Switch - Right (Uk3)
(4)Radio/Navigation Unit (UE1/U2K)
(5)Speaker - Right Tweeter
(6)Windshield Side Molding Garnish - Right
(7)Speaker - Right Front Door
(8)Antenna
(9)Speaker - Right Rear
(10)Instrument Panel Body Harness
(11)Speaker - Subwoofer (UQ3)
(12)C401 (U2K)
(13)Digital Radio Receiver (U2K)
(14)Cellular and Navigational Antenna (UE1/U2K)
(15)Audio Amplifier (UQ3)
(16)Speaker - Left Rear
(17)Speaker - Left Front Door
(18)Steering Wheel Control Switch - Left (K34)
(19)Windshield Side Molding Garnish - Left
(20)Horn Switch
Figure 3:

Instrument Panel Components


Object Number: 1845489  Size: LF
(1)Turn Signal/Multifunction Switch
(2)Steering Wheel Control Switch - Left
(3)Instrument Panel Cluster (IPC)
(4)Steering Wheel Control Switch - Right
(5)Ambient Light Sensor
(6)Hazard Switch
(7)Inflatable Restraint I/P Module
(8)I/P Compartment
(9)Rear Compartment Lid Release Switch
(10)Auxiliary Power Outlet
(11)Traction Control Switch
(12)Radio/Navigation Unit
(13)Park Brake Lever
(14)Shifter Knob
(15)Inflatable Restraint Passenger Air Bag On/Off Indicator
(16)HVAC Controls
(17)Windshield Wiper/Washer Switch
(18)Inflatable Restraint Steering Wheel Module
(19)Driver Information Center (DIC) Controls
(20)I/P Dimmer Switch
(21)Fog Lamp Switch