GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 GMC K Sierra - 4WD 🢒 Body and Accessories 🢒 Lighting Systems 🢒 HVAC Connector End Views
Table 1: A/C Compressor
Table 2: A/C Compressor High Pressure Cutout Switch
Table 3: A/C Compressor Low Pressure Cycling Switch (ALL)
Table 4: A/C Automatic Recirculating Switch
Table 5: Blower Motor
Table 6: C1-Blower Motor Resistor Relay Assembly
Table 7: Mode Door Motor (HVAC)
Table 8: Recirculation Door Motor (HVAC)
Table 9: Temperature Door Motor (HVAC)
Table 10: Auxiliary HVAC Logic Module (Suburban/Utility)
Table 11: HVAC Blower Switch (Part of HVAC Control Module)
Table 12: C-2 HVAC Blower Switch (Part of HVAC Control Module)
Table 13: C1-Rear Auxiliary Blower Motor Resistor Relay Assembly (Manual Utilites)
Table 14: C2- Rear Auxiliary Blower Motor Resistor Relay Assembly (Manual Utilities)
Table 15: Auxiliary HVAC Control Switch - Rear (Manual Utilities)
Table 16: Auxiliary HVAC Control Switch- Front (Rear HVAC Manual)
Table 17: Rear Auxiliary Blower Motor Switch
Table 18: C-2 HVAC Blower Switch (Manual A/C)
Table 19: Auxiliary Blower Motor Switch- Front (4 Door/Utility Only)

A/C Compressor


Object Number: 280759 Size: CH

Connector Part Information
    • 12162017
    • 2-Way F Metri-Pack 150 Series (MD GRY)

Pin

Wire Color

Circuit No.

Function

A

BLK

550

Ground

B

DK GRN

59

A/C Compressor Clutch Control

A/C Compressor High Pressure Cutout Switch


Object Number: 366093 Size: CH

Connector Part Information
    • 15317968
    • 2-Way F Micro-Pack 100 W Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

203

Air High Pressure Cutout Switch Feed

B

DK GRN/WHT

762

A/C Request Signal (PCM/VCM)

A/C Compressor Low Pressure Cycling Switch (ALL)


Object Number: 35437 Size: CH

Connector Part Information
    • 12052644
    • 2-Way F Metri-Pack 150 Series (LT GRY)

Pin

Wire Color

Circuit No.

Function

A

DK GRN

603

A/C Compressor Low Pressure Cycling Switch Output

B

BLK

550

Ground

A/C Automatic Recirculating Switch


Object Number: 35437 Size: CH

Connector Part Information
    • 12124037
    • 2-Way F Metri-Pack 150 (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK BLU

604

A/C Automatic Recirculating Switch Output

B

BLK

150

Ground

Blower Motor


Object Number: 62488 Size: CH

Connector Part Information
    • 12084957
    • 2-Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

PPL

65

Blower Motor Feed

B

BLK

1050

Ground

C1-Blower Motor Resistor Relay Assembly


Object Number: 73146 Size: CH

Connector Part Information
    • 12052854
    • 7-Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

TAN

63

Blower Switch Output - (Medium 1)

B

YEL

60

Blower Switch Output - (Low)

C

PPL

73

Blower Switch Output - (Medium 3)

D

LT BLU

72

Blower Switch Output - (Medium 2)

E

BLK

1050

Ground

F

ORN

52

Blower Switch Output - (High)

G

ORN

540

Battery Positive Voltage

Mode Door Motor (HVAC)


Object Number: 280764 Size: CH

Connector Part Information
    • 12064993
    • 6-Way F Micro-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

5

BRN

341

Ignition Positive Voltage

6

WHT

119

Mode Actuator Control

7

BLK

2450

Ground

8

--

--

Not Used

9

RED

708

Mode Actuator Signal

10

GRY

598

Reference Voltage Feed -5 Volt

Recirculation Door Motor (HVAC)


Object Number: 280764 Size: CH

Connector Part Information
    • 12064993
    • 6-Way F Micro-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

5

BRN

341

Ignition Positive Voltage

6

DK GRN

1614

Recirculation Actuator Control

7

BLK

2450

Ground

8-10

--

--

Not Used

Temperature Door Motor (HVAC)


Object Number: 280764 Size: CH

Connector Part Information
    • 12064993
    • 6-Way F Micro-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

5

BRN

341

Ignition Positive Voltage

6

DK BLU

1199

Temperature Actuator Control

7

BLK

2450

Ground

8

--

--

Not Used

9

LT BLU

733

Temperature Actuator Signal

10

GRY

598

Reference Voltage Feed -5 Volt

Auxiliary HVAC Logic Module (Suburban/Utility)


Object Number: 328486 Size: CH

Connector Part Information
    • 12040747
    • 12-Way PC Edgeboard -STD (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

733

Air Temperature Valve Position Sensor Signal

B

WHT/BLK

1236

Air Temperature Valve Motor Feed-Passenger

C

DK BLU

1646

Air Temperature Valve Position Sensor Signal-Passenger

D

LT BLU

2823

Mode 2

E

LT BLU

2822

Mode 1

F

WHT

454

Mode Switch output

G

--

--

Not Used

H

BLK

1450

Ground

J

BRN

541

Fused Ignition Positive Voltage

K

--

--

Not Used

L

GRY

778

Auxiliary Blower Motor Switched Output-Rear

M

ORN

1923

Auxiliary HVAC Switch Feed

HVAC Blower Switch (Part of HVAC Control Module)


Object Number: 73151 Size: CH

Connector Part Information
    • 12064799
    • 12-Way F Micro-Pack 100 (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK GRN

71

Blower Switch Output - Off

B

WHT

119

Mode Actuator Control

C

BLK

2450

Ground

D

DK GRN

1614

Recirculation Actuator Control

E

GRY

8

Instrument Panel Lamp Feed

F

DK BLU

1199

Temperature Actuator Control

G

LT BLU

733

Temperature Actuator Signal

H

GRY

598

Reference Voltage Feed - 5 Volt

J

WHT

193

Rear Window Defogger Relay Control

K

BRN

341

Ignition Positive Voltage

L

LT BLU

203

A/C High Pressure Cutout Switch Feed

M

RED

708

Mode Actuator Signal

C-2 HVAC Blower Switch (Part of HVAC Control Module)


Object Number: 62469 Size: CH

Connector Part Information
    • 12064998
    • 8-Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK GRN

71

Blower Switch Output - (Off)

B

BRN

141

Ignition Positive Voltage

C

ORN

52

Blower Switch Output - (High)

D

--

--

Not Used

E

PPL

73

Blower Switch Output - (Med 3)

F

LT BLU

72

Blower Switch Output - (Med 2)

G

TAN

63

Blower Switch Output - (Med 1)

H

YEL

60

Blower Switch Output - (Low)

C1-Rear Auxiliary Blower Motor Resistor Relay Assembly (Manual Utilites)


Object Number: 68737 Size: CH

Connector Part Information
    • 12129489
    • 3-Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK BLU

1926

Auxiliary HVAC Switch Output - Low

B

RED

1925

Auxiliary HVAC Switch Output - Medium

C

WHT

1924

Auxiliary HVAC Switch Output - High

C2- Rear Auxiliary Blower Motor Resistor Relay Assembly (Manual Utilities)


Object Number: 62450 Size: CH

Connector Part Information
    • 12052856
    • 4-Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

2850

Ground

A

BLK

1450

Ground

B

ORN

1740

Fused Battery Positive Voltage

C

BRN

541

Fused Ignition Positive Voltage

D

BRN

541

Fused Ignition Positive Voltage

Auxiliary HVAC Control Switch - Rear (Manual Utilities)


Object Number: 73152 Size: CH

Connector Part Information
    • 12092629
    • 16-Way F Micro-Pack
    • 100 Series (BLU)

Pin

Wire Color

Circuit No.

Function

A1

GRY

8

Instrument Panel Lamp Feed

A2

BRN

541

Fused Ignition Positive Voltage

A3

LT BLU

2823

Mode Switch Output

A3

WHT

454

Mode Switch Output (W/Sunroof)

A4

--

--

Not Used

A5

WHT

1924

Auxiliary HVAC Switch Output - (High)

A6

RED

1925

Auxiliary HVAC Switch Output - (Medium)

A7

DK BLU

1926

Auxiliary HVAC Switch Output - (Low)

A8

BLK

1450

Ground (W/Sunroof)

B1

GRY

8

Instrument Panel Lamp Feed

B2

BRN

541

Fused Ignition Positive Voltage

B3

DK BLU

1646

Air Temperature Valve Motor Feed - Passenger

B3

WHT/BLK

1236

Air Temperature Valve Motor Feed-Passenger (W/Sunroof)

B4

GRY

778

Auxiliary Blower Motor Rear Mounted Switch Output

B5

WHT

1924

Auxiliary HVAC Switch Output - (High)

B6

RED

1925

Auxiliary HVAC Switch Output - (Medium)

B7

DK BLU

1926

Auxiliary HVAC Switch Output - (Low)

B8

BLK

1450

Ground

Auxiliary HVAC Control Switch- Front (Rear HVAC Manual)


Object Number: 73152 Size: CH

Connector Part Information
    • 12084945
    • 16-Way F Micro-Pack
    • 100 Series (BLU)

Pin

Wire Color

Circuit No.

Function

A1

GRY

8

Instrument Panel Lamp Feed

A2

--

--

Not Used

A3

LT BLU

2822

Mode Switch Output

A4

ORN

1923

Controled Ground

A5

WHT

1924

Auxiliary HVAC Switch Output - (High)

A6

RED

1925

Auxiliary HVAC Switch Output - (Medium)

A7

DK BLU

1926

Auxiliary HVAC Switch Output - (Low)

A8 -B1

--

--

Not Used

B2

BRN

541

Fused Ignition Positive Voltage

B3

LT BLU

733

Air Temperature Position Sensor Signal

B4 -B7

--

--

Not Used

B8

BLK

1450

Ground

Rear Auxiliary Blower Motor Switch


Object Number: 356307 Size: CH

Connector Part Information
    • 12092632
    • 16-Way F Micro-Pack
    • 100 Series (RED)

Pin

Wire Color

Circuit No.

Function

A1

GRY

8

Instrument Panel Lamp feed

A2 -A4

--

--

Not Used

A5

WHT

1924

Auxiliary HVAC Switch Output - High

A6

RED

1925

Auxiliary HVAC Switch Output - Medium

A7

DK BLU

1926

Auxiliary HVAC Switch Output - Low

A8

BLK

1450

Ground

B1 -B3

--

--

Not Used

B4

ORN

1923

Rear Auxiliary Enable Control

B5

WHT

1924

Auxiliary Blower Motor High [position X] Speed Control

B6

RED

1925

Auxiliary Blower Motor Medium [position X] Speed Control

B7

DK BLU

1926

Auxiliary Blower Motor Low [position X] Speed Control

B8

BLK

1450

Ground

C-2 HVAC Blower Switch (Manual A/C)


Object Number: 62469 Size: CH

Connector Part Information
    • 12064998
    • 8 Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK GRN

71

Blower Switch Output - (Off)

B

BRN

141

Fused Ignition Positive voltage

C

ORN

52

Blower Switch Output - (High)

D

--

--

Not Used

E

PPL

73

Blower Switch Output - (Med 3)

F

LT BLU

72

Blower Switch Output - (Med 2)

G

TAN

63

Blower Switch Output - (Med 1)

H

YEL

60

Blower Switch Output - (Low)

Auxiliary Blower Motor Switch- Front (4 Door/Utility Only)


Object Number: 73152 Size: CH

Connector Part Information
    • 12110259--
    • 16-Way F Micro-Pack
    • 100 Series (GRN)

Pin

Wire Color

Circuit No.

Function

A1

GRY

8

Instrument Panel Lamp Feed

A2-A3

--

--

Not Used

A4

ORN

1923

Controled Ground

A5

WHT

1924

Auxiliary HVAC Switch Output - (High)

A6

RED

1925

Auxiliary HVAC Switch Output - (Medium)

A7

DK BLU

1926

Auxiliary HVAC Switch Output - (Low)

A8

BLK

1450

Ground

B1-B8

--

--

Not Used