Cellular Communication Connector End Views

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Cadillac Escalade EXT. However, it is still accessible from the selected car via links, so may be relevant.

Vehicle Interface Unit (VIU) Control Module - C1 Component Views

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12110113 32-Way F Micro-Pack 100 Series (RED)
Pin	Wire Color	Circuit No.	Function
A1	-	-	Not Used
A2	ORN	1044	Radio Class 2 Serial Data
A3	DK GRN	835	Entertainment and Comfort Serial Data
A4-A5	-	-	Not Used
A6	BLK/WHT	372	Remote Radio Audio Output (-)
A7	DK GRN/ WHT	368	Remote Playback Device Right Audio Signal
A8	BRN/WHT	367	Remote Playback Device Left Audio Signal
A9	BARE	814	Drain Wire
A10	LT BLU	1235	Audio Low Reference
A11	BRN/WHT	2506	Audio Return Signal
A12	DK GRN/ WHT	2507	Audio Transmit Signal
A13	BARE	1792	Drain Wire
A14	GRY/BLK	2508	Microphone Signal
A15	BARE	1782	Drain Wire
A16	ORN	2540	Battery Positive Voltage
B1-B8	-	-	Not Used
B9	GRY	655	Cellular Microphone Signal
B10	BARE	1705	Drain Wire
B11	TAN/BLK	2510	OnStar Serial Data Return
B12	DK BLU/ WHT	2511	OnStar Serial Data (-)
B13	LT BLU/ BLK	2512	OnStar Serial Data (+)
B14	GRY	2520	Transceiver Low Reference
B15	PPL/WHT	2513	Ignition ON Signal
B16	-	-	Not Used

Vehicle Interface Unit (VIU) Control Module - C2 Component Views

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12110115 32-Way F Micro-Pack 100 Series (BLU)
Pin	Wire Color	Circuit No.	Function
E1	BLK	1850	Ground
E2-E3	-	-	Not Used
E4	DK GRN/ WHT	2514	Keypad Signal
E5	YEL/BLK	2516	Keypad Green LED Signal
E6	LT GRN/ BLK	2515	Keypad Supply Voltage
E7-E15	-	-	Not Used
E16	ORN	2240	Battery Positive Voltage
F1	BLK	1850	Ground
F2-F3	-	-	Not Used
F4	ORN/BLK	2518	Keypad Low Reference
F5	-	-	Not Used
F6	PNK	739	Ignition 1 Voltage & UE1
F7-F8	-	-	Not Used
F9	BRN/WHT	2517	Keypad Red LED Signal
F10	-	-	Not Used
F11	BLK	707	RAP Relay Coil Supply Voltage & UE1
F12-F15	-	-	Not Used
F16	ORN	2240	Battery Positive Voltage

Vehicle Communication Unit (VCU) Component Views

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		205207-1 25 - Way F (BLK)
Pin	Wire Color	Circuit No.	Function
1	DK GRN/ WHT	2507	Audio Transmit Signal
2	-	-	Not Used
3	BLK	2520	Transceiver Low Reference
4	ORN	2540	Battery Positive Voltage
5	PPL/WHT	2513	Ignition On Signal
6	BRN/WHT	2506	Audio Return Signal
7-10	-	-	Not Used
11	LT BLU/ BLK	2512	OnStar Serial Data (+)
12	DK BLU/ WHT	2511	OnStar Serial Data (-)
13	-	-	Not Used
14	BLK	1792	Drain Wire
15	GRY/BLK	2508	Microphone Signal
16-17	-	-	Not Used
18	TAN/BLK	2510	Onstar Serial Data Return
19-23	-	-	Not Used
24	BLK/WHT	1235	Audio Low Reference
25	-	-	Not Used

OnStar Button Assembly Component Views

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12047886 8-Way F Metri-Pack 150 Series (BLK)
Pin	Wire Color	Circuit No.	Function
A	LT GRN/ BLK	2515	Keypad Supply Voltage
B	DK GRN/ WHT	2514	Keypad Signal
C-D	-	-	Not Used
E	ORN/BLK	2518	Keypad Low Reference
F	YEL/BLK	2516	Keypad Green LED Signal
G	BRN/WHT	2517	Keypad Red LED Signal
H	-	-	Not Used

Cellular Telephone Microphone Component Views

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12047662 2-Way F Metri-Pack 150 Series (BLK)
Pin	Wire Color	Circuit No.	Function
A	BARE	1705	Drain Wire
B	GRY	655	Cellular Microphone Signal