April 5, 2026: LEMON Manuals is launched! Read the announcement.

Cellular Communication Connector End Views

Inside Rearview Mirror (ISRM) (w/o UE1)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12124782 7-Way F (BK)
Pin	Wire Color	Circuit Number	Function
1	-	-	Not Used
2	BK	450	Ground
3-6	-	-	Not Used
7	OG	1732	Courtesy Lamps Supply Voltage

Inside Rearview Mirror (ISRM) (w/UE1)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15324960 16-Way F (D-GY)
Pin	Wire Color	Circuit Number	Function
1-5	-	-	Not Used
6	OG	1732	Courtesy Lamps Supply Voltage
7	-	-	Not Used
8	BK	450	Ground
9-10	-	-	Not Used
11	BN	2514	Keypad Signal
12	D-BU	2515	Keypad Supply Voltage
13	-	-	Not Used
14	GY	2516	Keypad Green LED Signal
15	BN/WH	2517	Keypad Red LED Signal
16	-	-	Not Used

Cellular Telephone Microphone

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12047663 2-Way F (BK)
Pin	Wire Color	Circuit Number	Function
A	D-GN	654	Cellular Telephone Microphone Low Reference
B	GY	655	Cellular Microphone Signal

Vehicle Communication Interface Module (VCIM) C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15383038 16-Way F (WH)
Pin	Wire Color	Circuit Number	Function
1	-	-	Not Used
2	BK/WH	2517	Keypad Red LED Signal
3	GY	2516	Keypad Green LED Signal
4-5	-	-	Not Used
6	D-BU	2515	Keypad Supply Voltage
7	BK	650	Ground
8	L-BU	650	Ground
9-10	-	-	Not Used
11	BN	2514	Keypad Signal
12-14	-	-	Not Used
15	OG	1340	Battery Positive Voltage
16	OG	1340	Battery Positive Voltage

Vehicle Communication Interface Module (VCIM) C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15383039 12-Way F (WH)
Pin	Wire Color	Circuit Number	Function
1	BN/WH	367	Left Audio Signal
2	BK/WH	372	Audio Common
3-5	-	-	Not Used
6	PU	1807	Class 2 Serial Data
7	D-GN/WH	368	Right Audio Signal
8	L-BU	814	Drain Wire
9	GY	655	Cellular Microphone Signal
10	D-GN	654	Cellular Telephone Microphone Low Reference
11	-	-	Not Used
12	YE/BK	693	Cellular Telephone Mute Signal