GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 2003 🢒 Ascender - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E/4L65-E 🢒 HVAC Connector End Views
Table 1: A/C Compressor Clutch Assembly
Table 2: A/C Low Pressure Switch
Table 3: A/C Refrigerant Pressure Sensor
Table 4: Air Temperature Actuator -- Auxiliary
Table 5: Air Temperature Actuator -- Left
Table 6: Air Temperature Actuator -- Right
Table 7: Air Temperature Sensor -- Lower Left
Table 8: Air Temperature Sensor -- Lower Right
Table 9: Air Temperature Sensor -- Upper Left
Table 10: Air Temperature Sensor -- Upper Right
Table 11: Air Temperature Sensor Assembly -- Inside
Table 12: Ambient Air Temperature Sensor
Table 13: Ambient Light/Sunload Sensor Assembly
Table 14: Blower Motor
Table 15: Blower Motor -- Auxiliary
Table 16: Blower Motor Control Module
Table 17: Blower Motor Control Processor -- Auxiliary
Table 18: Blower Motor Fuse -- Auxiliary
Table 19: Blower Motor Switch -- Front Auxiliary
Table 20: Console Mode Actuator
Table 21: Coolant Bypass Valve
Table 22: Defrost Actuator
Table 23: Fan/Temperature Switch
Table 24: HVAC Control Module C1
Table 25: HVAC Control Module C2
Table 26: HVAC Control Module-- Auxiliary
Table 27: Mode Actuator
Table 28: Mode Actuator -- Auxiliary
Table 29: Recirculation Actuator

A/C Compressor Clutch Assembly


Object Number: 684807 Size: CH

Connector Part Information
    • 12110293
    • 3-Way F Metri-Pack 150 Series Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

350

Ground

B

DK GRN

59

A/C Compressor Clutch Supply Voltage

C

LT GRN

2278

A/C Compressor Status Signal

A/C Low Pressure Switch


Object Number: 537107 Size: CH

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

Pin

Wire Color

Circuit No.

Function

A

DK BLU

204

A/C Low Pressure Sensor Signal

B

BLK

250

Ground

A/C Refrigerant Pressure Sensor


Object Number: 726824 Size: CH

Connector Part Information
    • 15344137
    • 3-Way F GT 150 Sealed 5.2 (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 -- Auxiliary


Object Number: 258172 Size: CH

Connector Part Information
    • 12064982
    • 5-Way F Metri-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

1

GRY

2598

Low Reference

2

DK BLU

1199

Auxiliary Air Temperature Door Position Signal

3

GRY/BLK

598

5 Volt Reference

4

RED

2600

Auxiliary Actuator Door Control

5

YEL

2214

Auxiliary Air Temperature Door Control

Air Temperature Actuator -- Left


Object Number: 281207 Size: CH

Connector Part Information
    • 12040953
    • 6-Way F Micro-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

5

BRN

341

Ignition 3 Voltage

6

DK BLU

1199

Left 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: 281207 Size: CH

Connector Part Information
    • 12040953
    • 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

Air Temperature Sensor -- Lower Left


Object Number: 82383 Size: CH

Connector Part Information
    • 12052642
    • 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
    • 12052642
    • 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 Left


Object Number: 82383 Size: CH

Connector Part Information
    • 12052642
    • 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
    • 12052642
    • 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 Assembly -- Inside


Object Number: 39661 Size: CH

Connector Part Information
    • 12047786
    • 4-Way M Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK GRN

734

Inside Air Temperature Sensor Signal

B

WHT/BLK

1236

Inside Air Temperature Sensor Assembly Control

C

BLK

1350

Ground

D

BRN

718

Low Reference

Ambient Air Temperature Sensor


Object Number: 684793 Size: CH

Connector Part Information
    • 12052642
    • 2-Way F Metri-Pack 150 Series Sealed (LT GRN)

Pin

Wire Color

Circuit No.

Function

A

LT GRN/

BLK

735

Ambient Air Temperature Sensor Signal

B

BRN

718

Low Reference

Ambient Light/Sunload Sensor Assembly


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

2519

Left Sunload Sensor Signal

B

GRY

2521

Right Sunload Sensor Signal

C

BLK

279

Ambient Light Sensor Low Reference

D

WHT

278

Ambient Light Sensor Signal

Blower Motor


Object Number: 62489 Size: CH

Connector Part Information
    • 12066681
    • 2-Way F Metri-Pack 630 Series, Sealed, Pull-to-Seat (BLK)

Pin

Wire Color

Circuit No.

Function

A

PPL

65

Blower Motor Supply Voltage

B

BLK

850

Ground

Blower Motor -- Auxiliary


Object Number: 695495 Size: CH

Connector Part Information
    • 15326870
    • 2-Way F GT 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

ORN

840

Battery Positive Voltage

B

BLK

250

Ground

Blower Motor Control Module


Object Number: 68737 Size: CH

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

Pin

Wire Color

Circuit No.

Function

A

RED

542

Battery Positive Voltage

B

PPL/WHT

760

Blower Motor Speed Control

C

BLK

2250

Ground

Blower Motor Control Processor -- Auxiliary


Object Number: 684908 Size: CH

Connector Part Information
    • 15326631
    • 4-Way F GT 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

1650

Ground

B

BLK

250

Ground

C

GRY

2604

Auxiliary Blower Motor Speed Control

D

ORN

840

Battery Positive Voltage

Blower Motor Fuse -- Auxiliary


Object Number: 350882 Size: CH

Connector Part Information
    • 12010105
    • Fuse Holder (BLK)

Pin

Wire Color

Circuit No.

Function

A

ORN

840

Battery Positive Voltage

B

ORN

840

Battery Positive Voltage

ORN

840

Battery Positive Voltage

Blower Motor Switch -- Front Auxiliary


Object Number: 333035 Size: CH

Connector Part Information
    • 12047781
    • 3-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

YEL

2277

Auxiliary HVAC Enable Control

B

GRY

2598

Low Reference

C

BRN/WHT

230

Instrument Panel Lamps Dimming Control

Console Mode Actuator


Object Number: 258172 Size: CH

Connector Part Information
    • 12064982
    • 5-Way F Micro-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

1

GRY

2598

Low Reference

2

LT BLU

5433

Console Mode Door Position Signal

3

GRY

598

5 Volt Reference

4

GRY

2599

Auxiliary Mode Door Control

5

LT GRN

5434

Console Mode Door Control

Coolant Bypass Valve


Object Number: 635009 Size: CH

Connector Part Information
    • 12052641
    • 2-Way F Metri-Pack 150 Series Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

GRY/BLK

1596

Coolant Bypass Solenoid Control

B

BLK

250

Ground

Defrost Actuator


Object Number: 281207 Size: CH

Connector Part Information
    • 12040953
    • 6-Way F Micro-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

5

BRN

341

Ignition 3 Voltage

6

TAN/BLK

2274

Defrost Door Control

7

YEL

1791

Low Reference

8

--

--

Not Used

9

LT GRN/BLK

2276

Defrost Door Position Signal

10

LT BLU/BLK

1688

5 Volt Reference

Fan/Temperature Switch


Object Number: 605511 Size: CH

Connector Part Information
    • 50-57-9405
    • 5-Way F (BLK)

Pin

Wire Color

Circuit Number

Function

1

LT GRN

1011

Remote Radio Control Signal

2

BRN

230

Instrument Panel Lamps Dimming Control

3

BLK

2250

Ground

4

--

--

Not Used

5

LT GRN

1011

Remote Radio Control Signal

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

LT GRN/

BLK

2276

Defrost Door Position Signal

A5

LT GRN

2275

Mode Door Position Signal

A6

--

--

Not Used

A7

BRN/WHT

230

Instrument Panel Lamps Dimming Control

A8

BLK/WHT

751

Ground

A9

GRY/BLK

1596

Coolant Bypass Solenoid Control

A10

YEL

2277

Not Used

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

TAN/BLK

2274

Defrost Door Control

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

B8

--

--

Not Used

B9

BLK

2250

Ground

B11

WHT

1038

Class 2 Serial Data

B12

LT GRN

2278

A/C Compressor Status Signal

HVAC Control Module C2


Object Number: 684939 Size: CH

Connector Part Information
    • 15336594
    • 12-Way F Micro Pack 100 (LT GRY)

Pin

Wire Color

Circuit No.

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

1236

Inside Air Temperature Sensor Control

M

PPL/WHT

760

Blower Motor Speed Control

HVAC Control Module-- Auxiliary


Object Number: 258912 Size: CH

Connector Part Information
    • 12110113
    • 32-Way F Micro-Pack 100 Series Sealed (RED)

Pin

Wire Color

Circuit No.

Function

A1

1999

A2

TAN

1946

Right Rear Low Level Audio Signal (-)

A3

YEL

116

Left Rear Speaker Output (-)

A4

LT BLU

115

Right Rear Speaker Output (-)

A5

BRN

199

Left Rear Speaker Output (+)

A6

DK BLU

46

Right Rear Speaker Output (+)

A7

BRN

599

Left Rear Low Level Audio Signal (+)

A8

DK BLU

546

Right Rear Low Level Audio Signal (+)

A9

--

--

Not Used

A10

LT BLU

5433

Console Mode Door Position Signal

A11

GRY

2599

Auxiliary Mode Door Control

A12

YEL

2214

Auxiliary Air Temperature Door Control

A13

GRY

598

5 Volt Reference

A14

GRY

2603

TXV Solenoid Control

A15

--

--

Not Used

A16

ORN

4340

Battery Positive Voltage

B1

BRN/WHT

230

Instrument Panel Lamps Dimming Control

B2

GRY

2289

Rear HVAC/Audio Class 2 Serial Data

B3

--

--

Not Used

B4

GRY

2604

Auxiliary Blower Motor Speed Control

B5-B9

--

--

Not Used

B10

BRN/WHT

2601

Auxiliary Mode Door Position Signal

B11

YEL

2277

Auxiliary HVAC Enable Control

B12

DK BLU

1199

Auxiliary Air Temperature Door Position Signal

B13

LT GRN

5434

Console Mode Door Control

B14

RED

2600

Auxiliary Actuator Door Control

B15

GRY

2598

Low Reference

B16

BLK

2250

Ground

Mode Actuator


Object Number: 281207 Size: CH

Connector Part Information
    • 12040953
    • 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

Low Reference

8

--

--

Not Used

9

LT GRN

2275

Mode Door Position Signal

10

LT BLU/BLK

1688

5 Volt Reference

Mode Actuator -- Auxiliary


Object Number: 258172 Size: CH

Connector Part Information
    • 12064982
    • 5-Way F Metri-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

1

GRY

2598

Low Reference

2

BRN/WHT

2601

Auxiliary Mode Door Position Signal

3

GRY/BLK

598

5 Volt Reference

4

RED

2600

Auxiliary Actuator Door Control

5

GRY

2599

Auxiliary Mode Door Control

Recirculation Actuator


Object Number: 281207 Size: CH

Connector Part Information
    • 12040953
    • 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

Low Reference

8

--

--

Not Used

9

PPL

1838

Recirculation Door Position Signal

10

LT BLU/

BLK

1688

5 Volt Reference