GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Express 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 HVAC Connector End Views
Table 1: A/C Compressor Clutch
Table 2: A/C High Pressure Switch - Diesel
Table 3: A/C High Pressure Switch - Gas
Table 4: A/C Low Pressure Switch - Diesel
Table 5: A/C Low Pressure Switch - Gas
Table 6: Auxiliary Blower Motor Relay, Low/Medium/High Connectors
Table 7: Auxiliary Blower Motor Resistor
Table 8: Auxiliary Blower Motor Switch
Table 9: Blower Motor
Table 10: Blower Motor - Auxiliary
Table 11: Blower Motor Resistor/Relay
Table 12: Front Auxiliary Controller
Table 13: HVAC Control Assembly C1 Connector
Table 14: HVAC Control Assembly C2 Connector
Table 15: HVAC Control Assembly C3 Connector
Table 16: Rear Auxiliary HVAC Controller
Table 17: Rear Auxiliary Mode Valve and Seal Assembly (Mode Door Motor)
Table 18: Rear Auxiliary Temperature Valve Assembly (Temperature Door Motor)

A/C Compressor Clutch


Object Number: 684852 Size: CH

Connector Part Information
    • 12162017
    • 2F M/P 150 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A

BLK

150

Ground

B

DK GRN

59

A/C Compressor Clutch Supply Voltage

A/C High Pressure Switch - Diesel


Object Number: 366093 Size: CH

Connector Part Information
    • 15317968
    • 2F Mic/P 100 W (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK GRN/WHT

2523

A/C Request Signal

B

DK GRN

603

A/C Low Pressure Switch Signal

A/C High Pressure Switch - Gas


Object Number: 366093 Size: CH

Connector Part Information
    • 15317968
    • 2F Mic/P 100 W (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK GRN/WHT

2523

A/C Request Signal

B

LT GRN

66

A/C Request Signal

A/C Low Pressure Switch - Diesel


Object Number: 537107 Size: CH

Connector Part Information
    • 12052638
    • 2F Metri-Pack 150 SLD (LT GRY)

Pin

Wire Color

Circuit No.

Function

A

LT GRN

66

A/C Request Signal

B

DK GRN

603

A/C Low Pressure Switch Signal

A/C Low Pressure Switch - Gas


Object Number: 537107 Size: CH

Connector Part Information
    • 12052644
    • 2F Metri-Pack 150 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A

BLK

150

Ground - w/o L18

A

DK GRN

603

A/C Low Pressure Switch Signal - w/L18

B

DK GRN

603

A/C Low Pressure Switch Signal - w/o L18

B

BLK

150

Ground - w/L18

Auxiliary Blower Motor Relay, Low/Medium/High Connectors


Object Number: 309518 Size: CH

Connector Part Information
    • 12129715
    • 6F M/P 280 FLXLK (MD GRY)

Pin

Wire Color

Circuit No.

Function

A1

WHT

1924

Auxiliary HVAC Switch Output (High)

A1

RED

1925

Auxiliary HVAC Switch Output (Medium)

A1

DK BLU

1926

Auxiliary HVAC Switch Output (Low)

A2

YEL

1172

Auxiliary Blower Motor Feed (High)

A2

LT BLU

1072

Auxiliary Blower Motor Feed (Medium)

A2

YEL

1176

Auxiliary Blower Motor Feed (Low)

B1-B2

--

--

Not Used

C1

RED

1542

Fuse Output - Battery - Type II Fuse

C2

BRN

341

Fuse Output - IGN 3 - Type III Fuse

Auxiliary Blower Motor Resistor


Object Number: 73229 Size: CH

Connector Part Information
    • 12129566
    • 4F M/P 280 SLD (MD GRY)

Pin

Wire Color

Circuit No.

Function

A

YEL

1176

Auxiliary Blower Motor Resistor Output (Low)

B

--

--

Not Used

C

LT BLU

1072

Auxiliary Blower Motor Resistor Output (Medium)

D

YEL

1172

Auxiliary Blower Motor Feed

Auxiliary Blower Motor Switch


Object Number: 62456 Size: CH

Connector Part Information
    • 12064752
    • 6F M/P 280 (BLK)

Pin

Wire Color

Circuit No.

Function

A

GRY

8

Instrument Panel Lamp Feed

B

BLK

150

Ground

C

--

--

Not Used

D

ORN

52

Blower Switch Output (High)

E

YEL

60

Blower Switch Output (Low)

F

TAN

63

Blower Switch Output (Medium 1)

Blower Motor


Object Number: 684799 Size: CH

Connector Part Information
    • 12077900
    • 2F M/P 280 SLD (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

150

Ground

B

PPL

65

Blower Motor Supply Voltage

Blower Motor - Auxiliary


Object Number: 684799 Size: CH

Connector Part Information
    • 12077900
    • 2F M/P 280 SLD (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

150

Ground

B

YEL

1172

Auxiliary Blower Motor Feed

Blower Motor Resistor/Relay


Object Number: 535914 Size: CH

Connector Part Information
    • 12160746
    • ASM 6F M/P 280 FLXLK SLD (LT GRY)

Pin

Wire Color

Circuit No.

Function

A

RED

542

Fuse Output Battery - Type II Fuse

B

ORN

52

Blower Switch Output (High)

C

BLK

150

Ground

D

TAN

63

Blower Switch Output (Medium 1)

E

YEL

60

Blower Switch Output (Low)

F

LT BLU

72

Blower Switch Output (Medium 2)

Front Auxiliary Controller


Object Number: 62464 Size: CH

Connector Part Information
    • 12064871
    • 10F M/P 150 (NAT)

Pin

Wire Color

Circuit No.

Function

A

GRY

8

Instrument Panel Lamp Supply Voltage - 1

B

BLK

150

Ground

C

YEL

60

Low [position X] Blower Motor Control

D

ORN

52

High [position X] Blower [Motor] Control

E

TAN

63

Medium 1 [position X] Blower Motor Control

F

LT BLU

203

A/C Request Signal

G

BRN

341

Ignition 3 Voltage

H

DK GRN

734

Inside Air Temperature Sensor Signal

J

LT BLU

733

Air Temperature Door Position Signal

K

--

--

Not Used

HVAC Control Assembly C1 Connector


Object Number: 62469 Size: CH

Connector Part Information
    • 12064998
    • 8F M/P 280 CLIP SLOT (BLK)

Pin

Wire Color

Circuit No.

Function

A

YEL

60

Blower Switch Output (Low)

B

TAN

63

Blower Switch Output (Medium 1)

C

LT BLU

72

Blower Switch Output (Medium 2)

D

ORN

52

Blower Switch Output (High)

E

BRN

141

Fuse Output - IGN 3 - Type III Fuse

F

LT BLU

733

AIR Temperature Valve Position Sensor Signal

G

WHT

119

Mode Switch Output

H

LT GRN

66

AIR Conditioning Switch Output

HVAC Control Assembly C2 Connector


Object Number: 62450 Size: CH

Connector Part Information
    • 12052856
    • 4F M/P 280 (BLK)

Pin

Wire Color

Circuit No.

Function

A

ORN

1440

Fuse Output - Battery - Type III Fuse

B

BRN

141

Fuse Output - IGN 3 - Type III Fuse

C

BLK

150

Ground

D

ORN

267

Heated Mirror Element Feed

HVAC Control Assembly C3 Connector


Object Number: 68737 Size: CH

Connector Part Information
    • 12129489
    • 3F M/P 280 TL FLXLK (BLK)

Pin

Wire Color

Circuit No.

Function

A

WHT

119

Mode Switch Output

B

BLK

150

Ground

C

GRY

8

Instrument Panel Lamp Feed

Rear Auxiliary HVAC Controller


Object Number: 283791 Size: CH

Connector Part Information
    • 12064871
    • 10F M/P 150 (BLU)

Pin

Wire Color

Circuit No.

Function

A

GRY

8

Instrument Panel Lamp Supply Voltage - 1

B

BLK

150

Ground

C

YEL

60

Low [position X] Blower Motor Control

D

ORN

52

High [position X] Blower [Motor] Control

E

TAN

63

Medium 1 [position X] Blower Motor Control

F

DK BLU

77

Heater and A/C Control Logic Module - Signal

G

BRN

341

Ignition 3 Voltage

H

DK GRN

734

Inside Air Temperature Sensor Signal

J

LT BLU

733

Air Temperature Door Position Signal

K

--

--

Not Used

Rear Auxiliary Mode Valve and Seal Assembly (Mode Door Motor)


Object Number: 281207 Size: CH

Connector Part Information
    • 12040953
    • 6F Mic/P 100 (BLK)

Pin

Wire Color

Circuit No.

Function

5

--

--

Not Used

6

--

--

Not Used

7

BLK

150

Ground

8

LT BLU

773

Air Temperature Valve Position Sensor - Signal

9

--

--

Not Used

10

BRN

341

Ignition 3 Voltage I

Rear Auxiliary Temperature Valve Assembly (Temperature Door Motor)


Object Number: 281207 Size: CH

Connector Part Information
    • 12040953
    • 6F Mic/P 100 (BLK)

Pin

Wire Color

Circuit No.

Function

5-6

--

--

Not Used

7

BLK

150

Ground

8

DK GRN

734

Inside Air Temperature Sensor Signal

9

--

--

Not Used

10

BRN

341

Ignition 3 Voltage