Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.3 T, 4L60E/M30REPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALBODY ELECTRICALOEM CONNECTOR END VIEWSINLINE HARNESS CONNECTOR END VIEWSC100 ENGINE HARNESS TO I/P HARNESS CONNECTOR END VIEW

2006 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.3 T, 4L60E/M30

C100 Engine Harness to I/P Harness Connector End View

2006 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.3 T, 4L60E/M30SECTION C100 Engine Harness to I/P Harness Connector End View

C100 Engine Harness to I/P Harness (JL4)

Courtesy of GENERAL MOTORS CORP.				Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15355480 30-Way F GT 150 Series Sealed (BK)		Connector Part Information		15355479 30-Way M GT 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function	Pin	Wire Color	Circuit No.	Function
A1	L-BU	1122	Class 2 Serial Data	A1	L-BU	1122	Class 2 Serial Data
A2	RD	4042	Battery Positive Voltage	A2	RD	4042	Battery Positive Voltage
A3	OG	52	Blower Motor High Control	A3	OG	52	Blower Motor High Control
A4	L-BU	72	Medium 2 Blower Motor Control	A4	L-BU	72	Medium 2 Blower Motor Control
A5	L-BU	2206	Traction Control Preference Switch Signal	A5	L-BU	2206	Traction Control Preference Switch Signal
B1	GY	626	5-Volt Reference	B1	GY	626	5-Volt Reference
B2	L-BU	1059	Steering Wheel Position Sensor Signal 1	B2	L-BU	1059	Steering Wheel Position Sensor Signal 1
B3	L-BU	1764	Steering Wheel Position Signal B	B3	L-BU	1764	Steering Wheel Position Signal B
B4	D-BU	84	Cruise Control Set/Coast Switch Signal (K34)	B4	D-BU	84	Cruise Control Set/Coast Switch Signal (K34)
B5	D-GN	1049	Class 2 Serial Data	B5	D-GN	1049	Class 2 Serial Data
B6	-	-	Not Used	B6	-	-	Not Used
B7	BN/WH	419	MIL Control	B7	BN/WH	419	MIL Control
B8	D-GN	2087	Yaw Rate Sensor 5-Volt Reference	B8	D-GN	2087	Yaw Rate Sensor 5-Volt Reference
B9	L-BU	2088	Yaw Rate Sensor Low Reference	B9	L-BU	2088	Yaw Rate Sensor Low Reference
B10	L-GN/BK	5352	Sensor Self Test Signal Circuit	B10	L-GN/BK	5352	Sensor Self Test Signal Circuit
C1	OG/BK	556	Steering Wheel Position Sensor Low Reference	C1	OG/BK	556	Steering Wheel Position Sensor Low Reference
C2	L-GN	1763	Steering Wheel Position Signal A	C2	L-GN	1763	Steering Wheel Position Signal A
C3	WH	1765	Steering Wheel Position Marker Pulse Signal	C3	WH	1765	Steering Wheel Position Marker Pulse Signal
C4	-	-	Not Used	C4	-	-	Not Used
C5	L-GN	66	A/C Request Signal	C5	L-GN	66	A/C Request Signal
C6	GY/BK	87	Cruise Control Resume/Accel Switch Signal (K34)	C6	GY/BK	87	Cruise Control Resume/Accel Switch Signal (K34)
C7	GY	397	Cruise Control On Switch Signal (K34)	C7	GY	397	Cruise Control On Switch Signal (K34)
C8	D-BU	716	Yaw Rate Sensor Signal	C8	D-BU	716	Yaw Rate Sensor Signal
C9	L-BU	715	Lateral Accelerometer Signal	C9	L-BU	715	Lateral Accelerometer Signal
C10	YE	5353	Yaw Rate Frequency	C10	YE	5353	Yaw Rate Frequency
D1	PK	1339	Ignition 1 Voltage	D1	PK	1339	Ignition 1 Voltage
D2	YE	60	Blower Motor Low Control	D2	YE	60	Blower Motor Low Control
D3	TN	63	Blower Motor Medium 1 Control	D3	TN	63	Blower Motor Medium 1 Control
D4	L-BU	1320	CHMSL Supply Voltage/Stop Lamp Supply Voltage	D4	L-BU	1320	CHMSL Supply Voltage/Stop Lamp Supply Voltage
D5	OG	1732	Inadvertent Power Supply Voltage	D5	OG	1732	Inadvertent Power Supply Voltage

C100 Engine Harness to I/P Harness (Diesel)

Courtesy of GENERAL MOTORS CORP.				Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15355480 30-Way F GT 150 Series Sealed (BK)		Connector Part Information		15355479 30-Way M GT 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function	Pin	Wire Color	Circuit No.	Function
A1	L-BU	1122	Class 2 Serial Data	A1	L-BU	1122	Class 2 Serial Data
A2	-	-	Not Used	A2	-	-	Not Used
A3	OG	52	Blower Motor High Control	A3	OG	52	Blower Motor High Control
A4	L-BU	72	Medium 2 Blower Motor Control	A4	L-BU	72	Medium 2 Blower Motor Control
A5	BN	1271	Low Reference	A5	BN	1271	Low Reference
B1	TN	2501	High Speed GMLAN Serial Data (-)	B1	TN	2501	High Speed GMLAN Serial Data (-)
B2	YE	343	Accessory Voltage	B2	YE	343	Accessory Voltage
B3	BN	141	Ignition 3 Voltage	B3	BN	141	Ignition 3 Voltage
B4	D-BU	84	Cruise Control Set/Coast Switch Signal (K34)	B4	D-BU	84	Cruise Control Set/Coast Switch Signal (K34)
B5	D-GN	1049	Class 2 Serial Data	B5	D-GN	1049	Class 2 Serial Data
B6	OG	534	High Idle Switch Signal	B6	OG	534	High Idle Switch Signal
B7	BN/WH	419	MIL Control	B7	BN/WH	419	MIL Control
B8	PU	1272	Low Reference	B8	PU	1272	Low Reference
B9	TN	2501	High Speed GMLAN Serial Data (-)	B9	TN	2501	High Speed GMLAN Serial Data (-)
B10	TN	1274	5-Volt Reference 2	B10	TN	1274	5-Volt Reference 2
C1	TN/BK	2500	High Speed GMLAN Serial Data (+)	C1	TN/BK	2500	High Speed GMLAN Serial Data (+)
C2	D-BU	1161	APP Sensor 1 Signal	C2	D-BU	1161	APP Sensor 1 Signal
C3	WH/BK	1164	5-Volt Reference 3	C3	WH/BK	1164	5-Volt Reference 3
C4	D-BU	507	Wait to Start Indicator Control	C4	D-BU	507	Wait to Start Indicator Control
C5	L-GN	66	A/C Request Signal (C60)	C5	L-GN	66	A/C Request Signal (C60)
C6	GY/BK	87	Cruise Control Resume/Accel Switch Signal (K34)	C6	GY/BK	87	Cruise Control Resume/Accel Switch Signal (K34)
C7	GY	397	Cruise Control On Switch Signal (K34)	C7	GY	397	Cruise Control On Switch Signal (K34)
C8	OG	2013	High Idle Indicator Control	C8	OG	2013	High Idle Indicator Control
C9	TN/BK	2500	High Speed GMLAN Serial Data (+)	C9	TN/BK	2500	High Speed GMLAN Serial Data (+)
C10	L-BU	1162	APP Sensor 2 Signal	C10	L-BU	1162	APP Sensor 2 Signal
D1	-	-	Not Used	D1	-	-	Not Used
D2	YE	60	Blower Motor Low Control	D2	YE	60	Blower Motor Low Control
D3	TN	63	Blower Motor Medium 1 Control	D3	TN	63	Blower Motor Medium 1 Control
D4	L-BU	1320	CHMSL Supply Voltage/Stop Lamp Supply Voltage	D4	L-BU	1320	CHMSL Supply Voltage/Stop Lamp Supply Voltage
D5	OG	1732	Inadvertent Power Supply Voltage	D5	OG	1732	Inadvertent Power Supply Voltage

RENDER: 1.0x

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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.