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 MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 722 (HVAC SYSTEMS - MANUAL)COMPONENT LOCATORHVAC CONNECTOR END VIEWS

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

HVAC Connector End Views

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION HVAC Connector End Views

WARNING: This page is about a different car, the 2006 GMC Sierra, 2006 GMC Cab & Chassis Sierra, 2006 Chevrolet Silverado, and 2006 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

A/C Compressor Clutch

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12162017 2-Way F Metri-Pack 150 Series (GY)
Pin	Wire Color	Circuit No.	Function
A	BK	550	Ground
B	D-GN	59	A/C Compressor Clutch Supply Voltage

A/C Low Pressure Switch

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12052644 2-Way F Metri-Pack 150 Series (GY)
Pin	Wire Color	Circuit No.	Function
A	D-BU	204	A/C Low Pressure Sensor Signal
B	BK	550	Ground

A/C Refrigerant Pressure Sensor

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15344137 3-Way F GT 150 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
1	BK	2751	Low Reference
2	GY	2700	5-Volt Reference
3	RD/BK	380	A/C Refrigerant Pressure Sensor Signal

Air Temperature Actuator - Left

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12064993 6-Way F Micro-Pack 100 Series (BK)
Pin	Wire Color	Circuit No.	Function
5	BN	341	Ignition 3 Voltage
6	D-BU	1199	Left Air Temperature Door Control
7	YE	1791	Low Reference
8	-	-	Not Used
9	L-BU	733	Air Temperature Door Position Signal
10	L-BU/BK	1688	5-Volt Reference

Air Temperature Actuator - Right

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12064993 6-Way F Micro-Pack 100 Series (BK)
Pin	Wire Color	Circuit No.	Function
5	BN	341	Ignition 3 Voltage
6	WH/BK	1236	Right Air Temperature Door Control
7	YE	1791	Low Reference
8	-	-	Not Used
9	D-BU	1646	Right Air Temperature Door Position Signal
10	L-BU/BK	1688	5-Volt Reference

Blower Motor Resistor Assembly

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12052854 7-Way F Metri-Pack 280 Series (BK)
Pin	Wire Color	Circuit No.	Function
A	TN	63	Medium 1 Blower Motor Control
B	YE	60	Blower Motor Low Control
C	PU	73	Medium 3 Blower Motor Control
D	L-BU	72	Medium 2 Blower Motor Control
E	BK	1050	Ground
F	OG	52	Blower Motor High Control
G	RD	542	Battery Positive Voltage

HVAC Control Module - C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12110206 24-Way F Micro-Pack 100 (L-BU)
Pin	Wire Color	Circuit No.	Function
A1	D-GN	1614	Recirculation Door Control
A2	D-BU	1646	Right Air Temperature Door Position Signal
A3	L-BU	733	Left Air Temperature Door Position Signal
A4	-	-	Not Used
A5	L-GN	2275	Mode Door Position Signal
A6	-	-	Not Used
A7	BN/WH	230	Instrument Panel Lamps Dimming Control
A8	BK/WH	1851	Ground
A9-A10	-	-	Not Used
A11	D-GN	71	OFF Blower Motor Control
A12	D-BU	204	A/C Low Pressure Sensor Signal
B1	WH/BK	1236	Right Air Temperature Door Control
B2	D-BU	1199	Left Air Temperature Door Control
B3	-	-	Not Used
B4	TN	2273	Mode Door Control
B5	BN	341	Ignition 3 Voltage
B6	YE	1791	Low Reference
B7	OG	4340	Battery Positive Voltage
B8	L-BU/BK	1688	5-Volt Reference
B9	BK	1050	Ground
B10	-	-	Not Used
B11	WH	1038	HVAC Class 2 Serial Data
B12	-	-	Not Used

HVAC Control Module - C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15326924 8-Way F GT 280 Series (BK)
Pin	Wire Color	Circuit No.	Function
A	PU	73	Medium 3 Blower Motor Control
B	L-BU	72	Medium 2 Blower Motor Control
C	TN	63	Blower Motor Medium 1 Control
D	YE	60	Blower Motor Low Control
E	-	-	Not Used
F	OG	52	Blower Motor High Control
G	BN	141	Ignition 3 Voltage
H	D-GN	71	OFF Blower Motor Control

Mode Actuator

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12064993 6-Way F Micro-Pack 100 Series (BK)
Pin	Wire Color	Circuit No.	Function
5	BN	341	Ignition 3 Voltage
6	TN	2273	Mode Door Control
7	YE	1791	Low Reference
8	-	-	Not Used
9	L-GN	2275	Mode Door Position Signal
10	L-BU/BK	1688	5-Volt Reference

Recirculation Actuator

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12064993 6-Way F Micro-Pack 100 Series (BK)
Pin	Wire Color	Circuit No.	Function
5	BN	341	Ignition 3 Voltage
6	D-GN	1614	Recirculation Door Control
7	BK	1050	Ground
8-10	-	-	Not Used

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.