GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 Envoy - 4WD 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 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 (Body Type VIN 6)
Table 5: Air Temperature Actuator -- Left
Table 6: Air Temperature Actuator -- Right
Table 7: Blower Motor
Table 8: Blower Motor -- Auxiliary (Body Type VIN 6)
Table 9: Blower Motor Control Processor -- Auxiliary (Body Type VIN 6)
Table 10: Blower Motor Fuse -- Auxiliary (Body Type VIN 6)
Table 11: Blower Motor Resistor Assembly
Table 12: Blower Motor Switch -- Front Auxiliary (Body Type VIN 6)
Table 13: Console Mode Actuator (Body Type VIN 6)
Table 14: Coolant Bypass Valve (Body Type VIN 6)
Table 15: Defrost Actuator
Table 16: HVAC Control Module C1
Table 17: HVAC Control Module C2
Table 18: HVAC Control Module -- Auxiliary (Body Type VIN 3)
Table 19: HVAC Control Module -- Auxiliary (Body Type VIN 6)
Table 20: Mode Actuator
Table 21: Mode Actuator -- Auxiliary (Body Type VIN 3)
Table 22: Mode Actuator -- Auxiliary (Body Type VIN 6)
Table 23: 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 (Body Type VIN 6)


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

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 (Body Type VIN 6)


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 Processor -- Auxiliary (Body Type VIN 6)


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 (Body Type VIN 6)


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 Resistor 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

Medium 1 Blower Motor Control

B

YEL

60

Low Blower Motor Control

C

PPL

73

Medium 3 Blower Motor Control

D

LT BLU

72

Medium 2 Blower Motor Control

E

BLK

2250

Ground

F

ORN

52

High Blower Motor Control

G

RED

542

Battery Positive Voltage

Blower Motor Switch -- Front Auxiliary (Body Type VIN 6)


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 (Body Type VIN 6)


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 (Body Type VIN 6)


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

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 (Body Type VIN 6)

A10

YEL

2277

Auxiliary HVAC Enable Control

A11

DK GRN

71

OFF Blower Motor Control

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

B9

BLK

2250

Ground

B10

--

--

Not Used

B11

WHT

1038

HVAC Class 2 Serial Data

B12

LT GRN

2278

A/C Compressor Status Signal

HVAC Control Module C2


Object Number: 556473 Size: CH

Connector Part Information
    • 15326924
    • 8-Way F GT 280 (BLK)

Pin

Wire Color

Circuit No.

Function

A

PPL

73

Medium 3 Blower Motor Control

B

LT BLU

72

Medium 2 Blower Motor Control

C

TAN

63

Medium 1 Blower Motor Control

D

YEL

60

Low Blower Motor Control

E

--

--

Not Used

F

ORN

52

High Blower Motor Control

G

BRN

141

Ignition 3 Voltage

H

DK GRN

71

OFF Blower Motor Control

HVAC Control Module -- Auxiliary (Body Type VIN 3)


Object Number: 280793 Size: CH

Connector Part Information
    • 12052444
    • 8-Way F Micro-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

1

BRN

341

Ignition 3 Voltage

2-3

--

--

Not Used

4

YEL

2277

Auxiliary HVAC Enable Control

5

--

--

Not Used

6

WHT

119

Auxiliary Mode Door Control

7

BLK

2250

Ground

8

BRN/WHT

230

Instrument Panel Lamps Dimming Control

HVAC Control Module -- Auxiliary (Body Type VIN 6)


Object Number: 73156 Size: CH

Connector Part Information
    • 12110088
    • 24-Way F Micro-Pack 100 Series Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

A1

BRN/WHT

230

Instrument Panel Lamps Dimming Control

A2

ORN

4340

Battery Positive Voltage

A3

GRY

2603

TXV Solenoid Control

A4

GRY

2599

Auxiliary Mode Door Control

A5

RED

2600

Auxiliary Actuator Door Control

A6

YEL

2277

Auxiliary HVAC Enable Control

A7

DK BLU

1199

Auxiliary Air Temperature Door Position Signal

A8

LT BLU

5433

Console Mode Door Position Signal

A9

GRY

598

5 Volt Reference

A10

--

--

Not Used

A11

GRY

2289

Rear HVAC/Audio Class 2 Serial Data

A12

--

--

Not Used

B1

BLK

2250

Ground

B2

GRY

2598

Low Reference

B3

YEL

2214

Auxiliary Air Temperature Door Control

B4

LT GRN

5434

Console Mode Door Control

B5

BRN/WHT

2601

Auxiliary Mode Door Position Signal

B6-B11

--

--

Not Used

B12

GRY

2604

Auxiliary Blower Motor Speed Control

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 (Body Type VIN 3)


Object Number: 258172 Size: CH

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

Pin

Wire Color

Circuit No.

Function

1

BRN

341

Ignition 3 Voltage

2

WHT

119

Auxiliary Mode Door Control

3

BLK

2250

Ground

4-5

--

--

Not Used

Mode Actuator -- Auxiliary (Body Type VIN 6)


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/WHT

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

BLK

2250

Ground

8-10

--

--

Not Used