GM Service Manual Online
For 1990-2009 cars only
Table 1: Ambient Air Temperature Sensor
Table 2: Blower Motor Control Module
Table 3: Blower Motor Connector C1
Table 4: Electric Actuator (Temperature)
Table 5: Electronic Climate Control (ECC) Module
Table 6: HVAC Vacuum Control Solenoid Valve
Table 7: Interior Air Temperature Sensor
Table 8: Inside Air Temperature Sensor (Distribution Duct)
Table 9: Inside Air Temperature Sensor (Floor Air Outlet)
Table 10: Sun Load Temperature Sensor

Ambient Air Temperature Sensor


Object Number: 35437  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A

BLK

552

Sensor Return

B

DK GRN/WHT

636

Ambient Air Temperature Sensor Signal

Blower Motor Control Module


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

Fuse Output-Battey

C

PPL/WHT

760

Blower Speed Signal-Speed Control-Low Energy

D

--

--

Not Used

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 Feed

B

BLK

850

Ground

Electric Actuator (Temperature)


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

Fuse Output - Ignition

6

DK BLU

1199

Air Temperature Valve Motor Feed

7

YEL

1791

Air Temperature Valve Motor Return

8

--

--

Not Used

9

LT BLU

733

Air Temperature Valve Position Sensor Signal

10

LT BLU/BLK

1688

Reference Voltage Feed - 5 Volt Reference

Electronic Climate Control (ECC) 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

Sun Load Temperature Sensor Input

C2

BRN

404

Inside Air Temperature Sensor Signal (Distribution Duct)

C3

LT GRN

405

Inside Air Temperature Signal (Floor Air Outlet)

C4

LT BLU

733

Electric Actuator Feedback Signal

C5

--

--

Not Used

C6

BRN

341

Fuse Output - Ignition 3

C7

GRY

1220

Fuse Output - Instrument Panel Lamps

C8

--

--

Not Used

C9

DK BLU

1199

Electric Actuator Feed

C10

BLK

1050

Ground

C11

WHT

1038

Serial Data Signal - Class 2

C12

ORN

340

Fuse Output - Battery

C13

LT BLU

706

Mode Valve Solenoid Output - Recirculation

C14

TAN

363

Mode Valve Solenoid Output - Upper

C15

PPL

361

Mode Valve Solenoid Output - Defrost

C16

PPL/WHT

760

Blower Speed Signal - Speed Control - Low Energy

D1

DK GRN

734

Interior Air Temperature Sensor Input

D2

DK GRN/WHT

636

Ambient Air Temperature Sensor Input

D3-D4

--

--

Not Used

D5

LT BLU/BLK

1688

5 Volt Reference

D6-D7

--

--

Not Used

D8

LT BLU

203

A/C Request for Air Conditioning Refrigerant High Pressure Cut-Out Switch Output

D9

BLK

552

Sensor Ground

D10

YEL

1791

Electric Actuator Sensor Return

D11-D13

--

--

Not Used

D14

WHT

193

Rear Defogger Relay Output - Coil

D15

LT GRN/BLK

366

Mode Valve Solenoid Output - Lower

D16

RED

362

Mode Valve Solenoid Output - Panel Vents

HVAC Vacuum Control Solenoid Valve


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

Mode Valve Solenoid Output - Defrost

2

RED

362

Mode Valve Solenoid Output - Panel Vents

3

TAN

363

Mode Valve Solenoid Output - Upper

4

LT GRN/BLK

366

Mode Valve Solenoid Output - Lower

5

LT BLU

706

Mode Valve Solenoid Output - Recirculation

6

BRN

341

Fuse Output - Ignition 3

Interior Air Temperature Sensor


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

Interior Air Temperature Sensor Signal

B

BRN

341

Fuse Output Ignition

C

BLK

1850

Ground

D

BLK

552

Sensor Return

Inside Air Temperature Sensor (Distribution Duct)


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

Discharge Air Temperature Sensor Signal - Upper

B

BLK

552

Sensor Return

Inside Air Temperature Sensor (Floor Air Outlet)


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

Inside Air Temperature Sensor Feed (Floor Air Outlet)

B

BLK

552

Sensor Return

Sun Load 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

Solar Sensor Signal - Drive

B

BLK

552

Sensor Return