GM Service Manual Online
For 1990-2009 cars only
Connector 1: A/C Compressor Clutch
Connector 2: A/C Refrigerant Pressure Sensor
Connector 3: Air Temperature Actuator - Left
Connector 4: Air Temperature Actuator - Right
Connector 5: Air Temperature Sensor - Inside
Connector 6: Air Temperature Sensor - Lower Left
Connector 7: Air Temperature Sensor - Lower Right
Connector 8: Air Temperature Sensor - Upper Left
Connector 9: Air Temperature Sensor - Upper Right
Connector 10: Ambient Air Temperature Sensor
Connector 11: Blower Motor Control Processor
Connector 12: HVAC Control Module C1
Connector 13: HVAC Control Module C2
Connector 14: HVAC Control Module C3
Connector 15: Mode Actuator
Connector 16: Recirculation Actuator
Connector 17: Sunload Sensor Assembly
Connector 18: Vacuum Bypass Valve Solenoid

A/C Compressor Clutch


Object Number: 684852  Size: CH

Connector Part Information

  • OEM: 12162017
  • Service: 12101937
  • Description: 2-Way F Metri-Pack 150 Series (GY)

Terminal Part Information

  • Terminal/Tray: 12048074/2
  • Core/Insulation Crimp: E/1
  • Release Tool/Test Probe: 12094429/J-35616-2A (GY)

A/C Compressor Clutch

Pin

Wire Color

Circuit No.

Function

A

BK

1250

Ground

B

D-GN

59

A/C Compressor Clutch Supply Voltage

A/C Refrigerant Pressure Sensor


Object Number: 258299  Size: CH

Connector Part Information

  • OEM: 12186827
  • Service: 12102748
  • Description: 3-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

A/C Refrigerant Pressure Sensor

Pin

Wire Color

Circuit No.

Function

A

BK/WH

2751

Low Reference

B

GY

2700

5-Volt Reference

C

OG/BK

380

A/C Refrigerant Pressure Sensor Signal

Air Temperature Actuator - Left


Object Number: 704047  Size: CH

Connector Part Information

  • OEM: 12059110
  • Service: 88953271
  • Description: 2-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Air Temperature Actuator - Left

Pin

Wire Color

Circuit No.

Function

A

D-BU/WH

1199

Left Air Temperature Door Control A

B

YE

1791

Left Air Temperature Door Control B

Air Temperature Actuator - Right


Object Number: 704047  Size: CH

Connector Part Information

  • OEM: 12059110
  • Service: 88953271
  • Description: 2-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Air Temperature Actuator - Right

Pin

Wire Color

Circuit No.

Function

A

WH/BK

1236

Right Air Temperature Door Control A

B

D-BU

1646

Right Air Temperature Door Control B

Air Temperature Sensor - Inside


Object Number: 1362560  Size: CH

Connector Part Information

  • OEM: 10738109
  • Service: 88953365
  • Description: 6-Way F Metri-Pack 280 Series (BK)

Terminal Part Information

  • Pins: 1, 3, 4, 6
  • Terminal/Tray: 928999-5/15
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: 12094429/J-35616-64B (L-BU)

Air Temperature Sensor - Inside

Pin

Wire Color

Circuit No.

Function

1

PK

639

Ignition 1 Voltage

2

--

--

Not Used

3

L-GN

5962

Inside Air Temperature Sensor Blower Control

4

D-GN

734

Inside Air Temperature Sensor Signal

5

--

--

Not Used

6

YE

61

Low Reference

Air Temperature Sensor - Lower Left


Object Number: 82383  Size: CH

Connector Part Information

  • OEM: 12047662
  • Service: 12085535
  • Description: 2-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Air Temperature Sensor - Lower Left

Pin

Wire Color

Circuit No.

Function

A

TN

518

Lower Left Air Temperature Sensor Signal

B

BN

718

Low Reference

Air Temperature Sensor - Lower Right


Object Number: 82383  Size: CH

Connector Part Information

  • OEM: 12047662
  • Service: 12085535
  • Description: 2-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Air Temperature Sensor - Lower Right

Pin

Wire Color

Circuit No.

Function

A

TN/BK

520

Lower Right Air Temperature Sensor Signal

B

GY

720

Low Reference

Air Temperature Sensor - Upper Left


Object Number: 82383  Size: CH

Connector Part Information

  • OEM: 12047662
  • Service: 12085535
  • Description: 2-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Terminal/Tray: 12064971/5
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12094429/J-35616-2A (GY)

Air Temperature Sensor - Upper Left

Pin

Wire Color

Circuit No.

Function

A

TN

516

Upper Left Air Temperature Sensor Signal

B

YE

61

Low Reference

Air Temperature Sensor - Upper Right


Object Number: 82383  Size: CH

Connector Part Information

  • OEM: 12047662
  • Service: 12085535
  • Description: 2-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Terminal/Tray: 12064971/5
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12094429/J-35616-2A (GY)

Air Temperature Sensor - Upper Right

Pin

Wire Color

Circuit No.

Function

A

TN

517

Upper Right Air Temperature Sensor Signal

B

YE

61

Low Reference

Ambient Air Temperature Sensor


Object Number: 635009  Size: CH

Connector Part Information

  • OEM: 12052635
  • Service: See Catalog
  • Description: 2-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Ambient Air Temperature Sensor

Pin

Wire Color

Circuit No.

Function

A

L-GN/BK

735

Ambient Air Temperature Sensor Signal

B

YE

61

Low Reference

Blower Motor Control Processor


Object Number: 68737  Size: CH

Connector Part Information

  • OEM: 12129489
  • Service: 12126486
  • Description: 3-Way F Metri-Pack 280 Series Flexlock (BK)

Terminal Part Information

  • Pins: A
  • Terminal/Tray: 15324340/19
  • Core/Insulation Crimp: F/G
  • Release Tool/Test Probe: 12094430/J-35616-4A (PU)
  • Pins: B
  • Terminal/Tray: 12110844/4
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
  • Pins: C
  • Terminal/Tray: 12110842/4
  • Core/Insulation Crimp: A/B
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)

Blower Motor Control Processor

Pin

Wire Color

Circuit No.

Function

A

RD/BK

442

Battery Positive Voltage

B

GY/BK

754

Blower Motor Speed Control

C

BK

1550

Ground

HVAC Control Module C1


Object Number: 744296  Size: CH

Connector Part Information

  • OEM: 12110259
  • Service: 12110259
  • Description: 16-Way F Micro-Pack 100 Series (GN)

Terminal Part Information

  • Pins: A1, A2, A7, A8, B1, B2, B3, B4, B5, B6, B7, B8
  • Terminal/Tray: 12146447/3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)

HVAC Control Module C1

Pin

Wire Color

Circuit No.

Function

A1

BK

1550

Ground

A2

WH

1038

HVAC Class 2 Serial Data

A3-A6

--

--

Not Used

A7

D-GN

734

Inside Air Temperature Sensor Signal

A8

TN

517

Upper Right Air Temperature Sensor Signal

B1

YE

61

Low Reference

B2

D-BU/WH

1355

Valet Mode Switch Signal

B3

YE/BK

68

Low Coolant Level Indicator Control

B4

L-GN

735

Ambient Air Temperature Sensor Signal

B5

L-BU/BK

590

Driver Sunload Sensor Signal

B6

GY

1548

Passenger Sunload Sensor Signal

B7

WH

278

Ambient Light Sensor Signal

B8

TN

516

Upper Left Air Temperature Sensor Signal

HVAC Control Module C2


Object Number: 744295  Size: CH

Connector Part Information

  • OEM: 12084944
  • Service: 12084944
  • Description: 16-Way F Micro-Pack 100 Series (BK)

Terminal Part Information

  • Pins: A1, A2, A3, A7, A8, B1, B2, B3, B4, B5
  • Terminal/Tray: 12146447/3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)

HVAC Control Module C2

Pin

Wire Color

Circuit No.

Function

A1

WH

193

Rear Defog Relay Control

A2

BN

1244

Instrument Panel Lamp Supply Voltage - 2

A3

L-GN

5962

Inside Air Temperature Sensor Blower Control

A4-A6

--

--

Not Used

A7

PK

639

Ignition 1 Voltage

A8

RD/WH

1240

Battery Positive Voltage

B1

GY/BK

1458

Instrument Panel Lamp Supply Voltage - 4

B2

GY/BK

1357

Instrument Panel Lamp Control

B3

GY/BK

754

Blower Motor Speed Control

B4

PK/BK

1503

Passenger Seat Temperature Control Signal

B5

PK

1501

Driver Seat Temperature Control Signal

B6-B8

--

--

Not Used

HVAC Control Module C3


Object Number: 73152  Size: CH

Connector Part Information

  • OEM: 12084945
  • Service: 12084945
  • Description: 16-Way F Micro-Pack 100 Series (GY)

Terminal Part Information

  • Pins: A1, A2, A3, A4, A5, A6, A7, A8, B1, B2, B3, B4
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

HVAC Control Module C3

Pin

Wire Color

Circuit No.

Function

A1

D-BU/WH

1199

Left Air Temperature Door Control A

A2

WH/BK

1236

Right Air Temperature Door Control A

A3

L-GN/BK

1647

Recirculation Door Control A

A4

TN

2273

Mode Door Control A

A5

BN

718

Low Reference

A6

TN

518

Lower Left Air Temperature Sensor Signal

A7

GY

720

Low Reference

A8

TN/BK

520

Lower Right Air Temperature Sensor Signal

B1

YE

1791

Left Air Temperature Door Control B

B2

D-BU

1646

Right Air Temperature Door Control B

B3

PK/WH

1648

Recirculation Door Control B

B4

L-GN

2275

Mode Door Control B

B5-B8

--

--

Not Used

Mode Actuator


Object Number: 333035  Size: CH

Connector Part Information

  • OEM: 12047781
  • Service: 12101864
  • Description: 3-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Pins: A, C
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Mode Actuator

Pin

Wire Color

Circuit No.

Function

A

TN

2273

Mode Door Control A

B

--

--

Not Used

C

L-GN

2275

Mode Door Control B

Recirculation Actuator


Object Number: 704047  Size: CH

Connector Part Information

  • OEM: 12059110
  • Service: 88953271
  • Description: 2-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Recirculation Actuator

Pin

Wire Color

Circuit No.

Function

A

L-GN/BK

1647

Recirculation Door Control A

B

PK/WH

1648

Recirculation Door Control B

Sunload Sensor Assembly


Object Number: 130637  Size: CH

Connector Part Information

  • OEM: 12064760
  • Service: 12085208
  • Description: 4-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Terminal/Tray: 12064971/5
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12094429/J-35616-2A (GY)

Sunload Sensor Assembly

Pin

Wire Color

Circuit No.

Function

A

L-BU/BK

590

Driver Solar Sensor Signal

B

GY

1548

Passenger Sunload Sensor Signal

C

YE

61

Low Reference

D

WH

278

Ambient Light Sensor Signal

Vacuum Bypass Valve Solenoid


Object Number: 856501  Size: CH

Connector Part Information

  • OEM: 10757676
  • Service: 88988501
  • Description: 2-Way F (GY)

Terminal Part Information

  • Terminal/Tray: 184095-1/7
  • Core/Insulation Crimp: E/D
  • Release Tool/Test Probe: 12094429/J-35616-33 (YE)

Vacuum Bypass Valve Solenoid

Pin

Wire Color

Circuit No.

Function

A

PK

539

Ignition- 1 Voltage

B

L-BU

7126

Super Charger Vacuum Bypass Valve Control