GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 GMC C Sierra - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E/4L65-E 🢒 HVAC Connector End Views
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 Sensor - Upper Left
Table 8: Air Temperature Sensor - Upper Right
Table 9: Air Temperature Sensor - Lower Left
Table 10: Air Temperature Sensor - Lower Right
Table 11: Blower Motor
Table 12: Blower Motor Control Processor
Table 13: HVAC Control Module - C1
Table 14: HVAC Control Module - C2
Table 15: Inside Air Temperature Sensor Assembly
Table 16: Mode Actuator
Table 17: Recirculation Actuator
Table 18: 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 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

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

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

Inside Air Temperature Sensor Assembly


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

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

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