GM Service Manual Online
For 1990-2009 cars only
Table 1: Air Temperature Actuator
Table 2: Air Temperature Sensor - Inside
Table 3: Air Temperature Sensor - Lower
Table 4: Air Temperature Sensor - Outside
Table 5: Air Temperature Sensor - Upper
Table 6: Blower Motor Connector C1
Table 7: Blower Motor Control Processor
Table 8: HVAC Control Module
Table 9: Sunload Temperature Sensor
Table 10: Vacuum Control Assembly

Air Temperature 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 BLU

1199

Air Temperature Door Control

7

YEL

1791

Low Reference

8

--

--

Not Used

9

LT BLU

733

Air Temperature Door Position Signal

10

LT BLU/BLK

1688

5 Volt Reference

Air Temperature Sensor - Inside


Object Number: 130635  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A

DK GRN

734

Inside Air Temperature Sensor Signal

B

BRN

341

Ignition 3 Voltage

C

BLK

1850

Ground

D

BLK

552

Low Reference

Air Temperature Sensor - Lower


Object Number: 82383  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A

LT GRN

405

Lower Discharge Air Temperature Sensor Signal

B

BLK

552

Low Reference

Air Temperature Sensor - Outside


Object Number: 35437  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A

BLK

552

Low Reference

B

DK GRN/WHT

636

Outside Air Temperature Sensor Signal

Air Temperature Sensor - Upper


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

404

Upper Discharge Air Temperature Sensor Signal

B

BLK

552

Low Reference

Blower Motor Connector C1


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 Control Processor


Object Number: 73229  Size: CH

Connector Part Information

    • 12129565
    • 4-Way F Metri-Pack 280 Series, Sealed (MD GRY)

Pin

Wire Color

Circuit No.

Function

A

BLK

850

Ground

B

ORN

540

Battery Positive Voltage

C

PPL/WHT

760

Blower Motor Speed Control

D

--

--

Not Used

HVAC Control Module


Object Number: 73157  Size: CH

Connector Part Information

    • 12045575
    • 32-Way F Micro-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

C1

LT BLU/BLK

590

Driver Solar Sensor Signal

C2

BRN

404

Upper Discharge Air Temperature Sensor Signal

C3

LT GRN

405

Lower Discharge Air Temperature Sensor Signal

C4

LT BLU

733

Air Temperature Door Position Signal

C5

--

--

Not Used

C6

BRN

341

Ignition 3 Voltage

C7

GRY

1220

Instrument Panel Lamp Fuse Supply Voltage - 2

C8

--

--

Not Used

C9

DK BLU

1199

Air Temperature Door Control

C10

BLK

1050

Ground

C11

WHT

1038

HVAC Class 2 Serial Data

C12

ORN

340

Battery Positive Voltage

C13

LT BLU

706

Recirculation Mode Valve Solenoid Control

C14

TAN

363

Lower Mode Valve Solenoid Control

C15

PPL

361

Mix-Blend Mode Valve Solenoid Control

C16

PPL/WHT

760

Blower Motor Speed Control

D1

DK GRN

734

Inside Air Temperature Sensor Signal

D2

DK GRN/WHT

636

Outside Air Temperature Sensor Signal

D3-D4

--

--

Not Used

D5

LT BLU/BLK

1688

5 Volt Reference

D6-D7

--

--

Not Used

D8

LT BLU

203

A/C Request Signal

D9

BLK

552

Low Reference

D10

YEL

1791

Low Reference

D11-D13

--

--

Not Used

D14

WHT

193

Rear Defog Relay Control

D15

LT GRN/BLK

366

Defrost Mode Valve Solenoid Control

D16

RED

362

Upper Mode Valve Solenoid Control

Sunload Temperature Sensor


Object Number: 82383  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A

LT BLU/BLK

590

Driver Solar Sensor Signal

B

BLK

552

Low Reference

Vacuum Control Assembly


Object Number: 40427  Size: CH

Connector Part Information

    • 12064978
    • 6-Way F Micro-Pack 100 Series (GRY)

Pin

Wire Color

Circuit No.

Function

1

PPL

361

Mix-Blend Mode Valve Solenoid Control

2

RED

362

Upper Mode Valve Solenoid Control

3

TAN

363

Lower Mode Valve Solenoid Control

4

LT GRN/BLK

366

Defrost Mode Valve Solenoid Control

5

LT BLU

706

Recirculation Mode Valve Solenoid Control

6

BRN

341

Ignition 3 Voltage