WARNING: This page is about a different car, the 2005 GMC Canyon and 2005 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.

Vehicle Communications Interface Module (VCIM) C1 Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15383038 16-Way F 040II (WH)
Pin	Wire Color	Circuit No.	Function
1	-	-	Not Used
2	BN/WH	2517	Keypad Red LED Signal
3	YE/BK	2516	Keypad Green LED Signal
4-5	-	-	Not Used
6	L-GN/BK	2515	Keypad Supply Voltage
7	BK/WH	1151	Ground
8-10	-	-	Not Used
11	D-GN/WH	2514	Keypad Signal
12-15	-	-	Not Used
16	OG	340	Battery Positive Voltage

Vehicle Communications Interface Module (VCIM) C2 Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15383039 12-Way F 040II (WH)
Pin	Wire Color	Circuit No.	Function
1	L-BU	1405	Remote Playback Device Audio Common Signal
2	OG/BK	1406	Remote Playback Device Left Audio Signal
3-4	-	-	Not Used
5	PU	1807	Class 2 Serial Data
6-7	-	-	Not Used
8	BARE	2012	Drain Wire
9	GY	655	Cellular Microphone Signal
10	BARE	1705	Drain Wire
11-12	-	-	Not Used

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Cellular Communication Connectors

Use the Manual With the Right Hardware

When to See a Mechanic

Rather have a pro handle this?