GM Service Manual Online
For 1990-2009 cars only
Table 1: A/C Compressor Clutch
Table 2: A/C Low Pressure Switch
Table 3: A/C Refrigerant Pressure Sensor
Table 4: Air Temperature Actuator - Left
Table 5: Air Temperature Actuator - Right
Table 6: Ambient Air Temperature Sensor
Table 7: Air Temperature Actuator - Auxiliary
Table 8: Air Temperature Sensor - Upper Left
Table 9: Air Temperature Sensor - Upper Right
Table 10: Air Temperature Sensor - Lower Left
Table 11: Air Temperature Sensor - Lower Right
Table 12: Air Temperature Sensor - Upper Auxiliary
Table 13: Air Temperature Sensor - Lower Auxiliary
Table 14: Blower Motor
Table 15: Blower Motor Control Processor
Table 16: Blower Motor - Auxiliary
Table 17: Blower Motor Control Processor - Auxiliary
Table 18: HVAC Control Module C1
Table 19: HVAC Control Module C2
Table 20: HVAC Control Module - Auxiliary C1
Table 21: HVAC Control Module - Auxiliary C2
Table 22: HVAC Control Assembly Front Auxiliary
Table 23: Air Temperature Sensor Assembly - Inside
Table 24: Auxiliary Air Temperature Sensor Assembly - Inside
Table 25: Mode Actuator
Table 26: Mode Actuator - Auxiliary
Table 27: Recirculation Actuator
Table 28: Sunload Sensor

A/C Compressor Clutch


Object Number: 684852  Size: CH

Connector Part Information

    • 12162017
    • 2-Way F Metri-Pack 150 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A

BLK

550

Ground

B

DK GRN

59

A/C Compressor Clutch Supply Voltage

A/C Low Pressure Switch


Object Number: 537107  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A

DK BLU

204

A/C Low Pressure Sensor Signal

B

BLK

550

Ground

A/C Refrigerant Pressure Sensor


Object Number: 726824  Size: CH

Connector Part Information

    • 15344137
    • 3-Way F GT 150 Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

1

BLK

2751

Low Reference

2

GRY

2700

5-Volt Reference

3

RED/BLK

380

A/C Refrigerant Pressure Sensor Signal

Air Temperature Actuator - Left


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 3 Voltage

6

DK BLU

1199

Auxiliary Air Temperature Door Control

7

YEL

1791

Low Reference

8

--

--

Not Used

9

LT BLU

733

Left Air Temperature Door Position Signal

10

LT BLU/BLK

1688

5-Volt Reference

Air Temperature Actuator - Right


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 3 Voltage

6

WHT/BLK

1236

Right Air Temperature Door Control

7

YEL

1791

Low Reference

8

--

--

Not Used

9

DK BLU

1646

Right Air Temperature Door Position Signal

10

LT BLU/BLK

1688

5-Volt Reference

Ambient Air Temperature Sensor


Object Number: 635009  Size: CH

Connector Part Information

    • 12052641
    • 2-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT GRN/BLK

735

Ambient Air Temperature Sensor Signal

B

BRN

718

Low Reference

Air Temperature Actuator - Auxiliary


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

541

Ignition 3 Voltage

6

WHT/BLK

1236

Air Temperature Door Control - Auxiliary

7

YEL

1791

Low Reference

8

--

--

Not Used

9

DK BLU

1646

Auxiliary Air Temperature Door Position Signal

10

GRY

598

5-Volt Reference

Air Temperature Sensor - Upper Left


Object Number: 82383  Size: CH

Connector Part Information

    • 12047662
    • 2-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

718

Low Reference

B

WHT

2338

Upper Left Air Temperature Sensor Signal

Air Temperature Sensor - Upper Right


Object Number: 82383  Size: CH

Connector Part Information

    • 12047662
    • 2-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

718

Low Reference

B

GRY

2336

Upper Right Air Temperature Sensor Signal

Air Temperature Sensor - Lower Left


Object Number: 82383  Size: CH

Connector Part Information

    • 12047662
    • 2-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

718

Low Reference

B

WHT/BLK

2339

Lower Left Air Temperature Sensor Signal

Air Temperature Sensor - Lower Right


Object Number: 82383  Size: CH

Connector Part Information

    • 12047662
    • 2-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

718

Low Reference

B

GRY/BLK

2337

Lower Right Air Temperature Sensor Signal

Air Temperature Sensor - Upper Auxiliary


Object Number: 82383  Size: CH

Connector Part Information

    • 12047662
    • 2-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

TAN

517

Upper Auxiliary Air Temperature Sensor Signal

B

BLK

516

Low Reference

Air Temperature Sensor - Lower Auxiliary


Object Number: 82383  Size: CH

Connector Part Information

    • 12047662
    • 2-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

520

Lower Auxiliary Air Temperature Sensor Signal

B

BLK

518

Low Reference

Blower Motor


Object Number: 35456  Size: CH

Connector Part Information

    • 12064749
    • 2-Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

PPL

--

Blower Motor Supply Voltage

B

BLK

--

Ground

Blower Motor Control Processor


Object Number: 68737  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A

RED

542

Battery Positive Voltage

B

PPL/WHT

760

Blower Motor Speed Control

C

BLK

1050

Ground

Blower Motor - Auxiliary


Object Number: 35456  Size: CH

Connector Part Information

    • 12064749
    • 2-Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

PPL

--

Blower Motor - Auxiliary Supply Voltage

B

BLK

--

Ground

Blower Motor Control Processor - Auxiliary


Object Number: 68737  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A

BLK

1450

Ground

B

PPL

374

Auxiliary Blower Motor Speed Control

C

ORN

1740

Battery Positive Voltage

HVAC Control Module C1


Object Number: 130690  Size: CH

Connector Part Information

    • 12110206
    • 24-Way F Micro-Pack 100 Series (LT BLU)

Pin

Wire Color

Circuit No.

Function

A1

DK GRN

1614

Recirculation Door Control

A2

DK BLU

1646

Right Air Temperature Door Position Signal

A3

LT BLU

733

Left Air Temperature Door Position Signal

A4

--

--

Not Used

A5

LT GRN

2275

Mode Door Position Signal

A6

--

--

Not Used

A7

BRN/WHT

230

Instrument Panel Lamps Dimming Control

A8

BLK/WHT

1851

Ground

A9-A11

--

--

Not Used

A12

DK BLU

204

A/C Low Pressure Sensor Signal

B1

WHT/BLK

1236

Right Air Temperature Door Control

B2

DK BLU

1199

Left Air Temperature Door Control

B3

--

--

Not Used

B4

TAN

2273

Mode Door Control

B5

BRN

341

Ignition 3 Voltage

B6

YEL

1791

Low Reference

B7

ORN

4340

Battery Positive Voltage

B8

LT BLU/

BLK

1688

5-Volt Reference

B9

BLK

1050

Ground

B10

--

--

Not Used

B11

WHT

1038

HVAC Class 2 Serial Data

B12

--

--

Not Used

HVAC Control Module C2


Object Number: 684939  Size: CH

Connector Part Information

    • 15336594
    • 12-Way F Micro Pack 100 (GRY)

Pin

Wire Color

Circuit Number

Function

A

DK GRN

734

Inside Air Temperature Sensor Signal

B

LT GRN/

BLK

735

Ambient Air Temperature Sensor Signal

C

WHT

2338

Upper Left Air Temperature Sensor Signal

D

GRY

2336

Upper Right Air Temperature Sensor Signal

E

WHT/BLK

2339

Lower Left Air Temperature Sensor Signal

F

GRY/BLK

2337

Lower Right Air Temperature Sensor Signal

G

PPL

1838

Recirculation Door Position Signal

H-J

--

--

Not Used

K

BRN

718

Low Reference

L

WHT/BLK

5515

Inside Air Temperature Sensor Assembly Control

M

PPL/WHT

760

Blower Motor Speed Control

HVAC Control Module - Auxiliary C1


Object Number: 73152  Size: CH

Connector Part Information

    • 12084945
    • 16-Way F Micro Pack 100 Series (GRY)

Pin

Wire Color

Circuit Number

Function

A1

GRY

2821

5-Volt Reference

A2

DK BLU

5518

Auxiliary Inside Air Temperature Sensor Signal

A3

TAN

517

Upper Auxiliary Air Temperature Sensor Signal

A4

BRN

5517

Low Reference

A5

ORN

2930

Auxiliary Front Air Temperature Switch Signal

A6

WHT

454

Auxiliary Front Mode Switch Signal

A7- A8

--

--

Not Used

B1

DK BLU

5516

Inside Air Temperature Sensor Assembly Control

B2

PPL/WHT

760

Auxiliary Front Blower Motor Switch Signal

B3-B5

--

--

Not Used

B6

BLK

516

Low Reference

B7

YEL

2933

Ground

B8

--

--

Not Used

HVAC Control Module - Auxiliary C2


Object Number: 356307  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit Number

Function

A1

DK BLU

1646

Auxiliary Air Temperature Door Position Signal

A2

YEL/BLK

1814

Auxiliary Mode Door Position Signal

A3

--

--

Not Used

A4

BLK

1450

Ground

A5

WHT/BLK

1236

Auxiliary Air Temperature Door Control

A6

WHT

454

Auxiliary Front Mode Switch Signal

A7

ORN

3140

Battery Positive Voltage

A8

GRY

2289

Rear HVAC/Audio Class 2 Serial Data

B1

GRY

598

5-Volt Reference

B2

GRY

2599

5-Volt Reference

B3

YEL

1791

Low Reference

B4

GRY/BLK

1798

Low Reference

B5

BLK

520

Lower Auxiliary Air Temperature Sensor Signal

B6

PPL

374

Auxiliary Blower Motor Speed Control

B7

BLK

518

Low Reference

B8

--

--

Not Used

HVAC Control Assembly Front Auxiliary


Object Number: 744295  Size: CH

Connector Part Information

    • 12084944
    • 16-Way F Micro Pack 100 Series (BLK)

Pin

Wire Color

Circuit Number

Function

A1

--

--

Not Used

A2

GRY

2821

5-Volt Reference

A3-A4

--

--

Not Used

A5

BLK

1050

Ground

A6-A7

--

--

Not Used

A8

BRN/WHT

230

Instrument Panel Lamps Dimming Control

B1

ORN

2930

Auxiliary Front Air Temperature Switch Signal

B2

--

--

Not Used

B3

WHT

454

Auxiliary Front Mode Switch Signal

B4-B5

--

--

Not Used

B6

YEL

2933

Ground

B7

--

--

Not Used

B8

PPL/WHT

760

Auxiliary Front Blower Motor Switch Signal

Air Temperature Sensor Assembly - Inside


Object Number: 130635  Size: CH

Connector Part Information

    • 12045813
    • 4-Way F Metri-Pack 150 (NAT)

Pin

Wire Color

Circuit No.

Function

A

DK GRN

734

Inside Air Temperature Sensor Signal

B

WHT/BLK

5515

Inside Air Temperature Sensor Assembly Control

C

BLK

1050

Ground

D

BRN

718

Low Reference

Auxiliary Air Temperature Sensor Assembly - Inside


Object Number: 130635  Size: CH

Connector Part Information

    • 12045813
    • 4-Way F Metri-Pack 150 (NAT)

Pin

Wire Color

Circuit No.

Function

A

DK BLU

5518

Auxiliary Inside Air Temperature Sensor Signal

B

DK BLU

5516

Inside Air Temperature Sensor Assembly Control

C

BLK

1050

Ground

D

BRN

5517

Low Reference

Mode Actuator


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 3 Voltage

6

TAN

2273

Mode Door Control

7

YEL

1791

Ground

8

--

--

Not Used

9

LT GRN

2275

Mode Door Position Signal

10

LT BLU/

BLK

1688

5-Volt Reference

Mode Actuator - Auxiliary


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

541

Ignition 3 Voltage

6

WHT

454

Mode Door Control - Auxiliary

7

GRY/BLK

1798

Ground

8

--

--

Not Used

9

YEL/BLK

1814

Auxiliary Mode Door Position Signal

10

GRY

2599

5-Volt Reference

Recirculation Actuator


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 3 Voltage

6

DK GRN

1614

Recirculation Door Control

7

YEL

1791

Ground

8

--

--

Not Used

9

PPL

1838

Recirculation Door Position Signal

10

LT BLU/

BLK

1688

5-Volt Reference

Sunload Sensor


Object Number: 130637  Size: CH

Connector Part Information

    • 12064760
    • 4-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT BLU/BLK

590

Driver Sunload Sensor Signal

B

GRY

1548

Passenger Sunload Sensor Signal

C

BLK

279

Ambient Light Sensor Low Reference

D

WHT

278

Ambient Light Sensor Signal