GM Service Manual Online
For 1990-2009 cars only
Table 1: A/C Compressor Clutch
Table 2: A/C Compressor Cycling Switch
Table 3: A/C Compressor High Pressure Cutoff Switch
Table 4: Air Temperature Valve Sensor and Motor
Table 5: Ambient Temperature Sensor, RH
Table 6: Ambient Temperature Sensor, LH
Table 7: Blower Motor
Table 8: Duct Air Temperature Sensor (Air Distribution Duct)
Table 9: Duct Air Temperature Sensor (Floor Air Outlet)
Table 10: Electronic Climate Control (EEC) Module
Table 11: HVAC Solenoid Assembly
Table 12: Inside Air Temperature Sensor
Table 13: Sun Load Temperature Sensor

A/C Compressor Clutch


Object Number: 280759  Size: CH

Connector Part Information

    • 12162017
    • 2-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

350

Ground

B

DK GRN

59

Air Conditioning Compressor Clutch Solenoid Feed

A/C Compressor Cycling Switch


Object Number: 38562  Size: CH

Connector Part Information

    • 12162440
    • 2-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK GRN

603

Air Conditioning Refrigerant Low Pressure Cut-Out Switch Output

B

BLK/WHT

351

Ground

A/C Compressor High Pressure Cutoff Switch


Object Number: 38560  Size: CH

Connector Part Information

    • 12162438
    • 2-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

203

Air Conditioning Refrigerant High Pressure Cut-Out Switch Feed

B

DK GRN/WHT

762

Air Conditioning Request Signal

Air Temperature Valve Sensor and Motor


Object Number: 40427  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

1

BRN

341

Fuse Output - Ignition

2

DK BLU

1199

Air Temperature Valve Motor Feed

3

YEL

1791

Air Temperature Valve Motor Return

4

--

--

Not Used

5

LT BLU

733

Air Temperature Valve Position Sensor Signal

6

LT BLU/BLK

1688

Reference Voltage Feed - 5 Volt Reference

Ambient Temperature Sensor, RH


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

Outside Ambient Temperature Sensor Signal

Ambient Temperature Sensor, LH


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

451

Engine Control Module Ground

B

LT GRN/BLK

735

Outside Ambient Temperature Sensor Signal

Blower Motor


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-Type 3 Fuse

C

PPL/WHT

760

Blower Speed Signal-Speed Control-Low Energy

D

--

--

Not Used

Duct Air Temperature Sensor (Air 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

Fuse Output - Battery

B

BLK

552

Sensor Return

Duct 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

Fuse Output - Battery

B

BLK

552

Sensor Return

Electronic Climate Control (EEC) Module


Object Number: 73221  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

Solar Sensor Input

C2

BRN

404

Output Air Temperature (Upper) Input

C3

LT GRN

405

Output Air Temperature (Lower) Input

C4

LT BLU

733

Elect Actuator ASM Position Feedback

C5

--

--

Not Used

C6

BRN

341

IGN 3 Input (Hot in RUN Only)

C7

GRY

1220

Dimming Input for Illumination

C8

--

--

Not Used

C9

DK BLU

1199

Elect Actuator ASM Position Direction Control

C10

BLK

1050

Module Ground

C11

PPL

1807

Class 2

C12

ORN

340

Battery Input (Hot at All Times)

C13

LT BLU

706

Air Inlet Solenoid 5 (Low Side Driver)

C14

TAN

363

Air Inlet Solenoid 3 (Low Side Driver)

C15

PPL

361

Air Inlet Solenoid 1 (Low Side Driver)

C16

PPL/WHT

760

Blower Control Module ASM Speed Output

D1

DK GRN

734

Inside 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 Compressor Request (VCM)

D9

BLK

552

Sensor Ground

D10

YEL

1791

Electric Actuator ASM Ground

D11-D13

--

--

Not Used

D14

WHT

193

Rear Defogger Relay (Low Side Driver)

D15

LT GRN/BLK

366

Air Inlet Solenoid 4 (Low Side Driver)

D16

RED

362

Air Inlet Solenoid 2 (Low Side Driver)

NOTE: Refer to Typical Scan Tool Data Values for more information.

HVAC Solenoid 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

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 - Type III Fuse

Inside 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

Inside Temperature Sensor Signal

B

BRN

341

Fuse Output - Ignition 3

C

BLK

1850

Ground

D

BLK

552

Sensor Return

Sun Load Temperature Sensor


Object Number: 82383  Size: CH

Connector Part Information

    • 12047662
    • 2-Way M 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