GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Express - AWD 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 HVAC Connector End Views
Table 1: A/C Compressor Clutch (C60)
Table 2: A/C High Pressure Switch (C60)
Table 3: A/C Low Pressure Switch (C60)
Table 4: Air Temperature Actuator
Table 5: Air Temperature Actuator - Auxiliary (C69)
Table 6: Blower Motor
Table 7: Blower Motor - Auxiliary (C36/C69)
Table 8: Blower Motor Resistor Assembly
Table 9: Blower Motor Resistor Assembly - Auxiliary (C36/C69)
Table 10: Blower Motor Switch - Auxiliary (C36 w/o C69)
Table 11: HVAC Control Assembly - C1
Table 12: HVAC Control Assembly - C2
Table 13: HVAC Control Assembly - C3 (C49/DE5/DE7)
Table 14: HVAC Control Assembly - Front Auxiliary (Rear Auxiliary Controls)
Table 15: HVAC Control Assembly - Front Auxiliary (w/o Rear Auxiliary Controls)
Table 16: HVAC Control Assembly - Rear Auxiliary (Rear Auxiliary Controls)
Table 17: HVAC Control Processor - Auxiliary (Rear Auxiliary Controls)
Table 18: High Speed Blower Motor Relay - Auxiliary (C36/C69)
Table 19: Low Speed Blower Motor Relay - Auxiliary (C36/C69)
Table 20: Med Speed Blower Motor Relay - Auxiliary (C36/C69)
Table 21: Mode Actuator - Auxiliary (C69)

A/C Compressor Clutch (C60)


Object Number: 684852 Size: CH

Connector Part Information
    • 12162017
    • 2-Way F Metri-Pack 150 Series- Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

A

BLK

1250

Ground

B

DK GRN

59

A/C Compressor Clutch Supply Voltage

A/C High Pressure Switch (C60)


Object Number: 366093 Size: CH

Connector Part Information
    • 15317968
    • 2-Way F Micro-Pack 100W (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 (C60)


Object Number: 537107 Size: CH

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

Pin

Wire Color

Circuit No.

Function

A

DK GRN

603

A/C Low Pressure Switch Signal

B

BLK

1250

Ground

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

5-6

--

--

Not Used

7

BLK

550

Ground

8

LT BLU

733

Air Temperature Door Control

9

--

--

Not Used

10

BRN

341

Ignition 3 Voltage

Air Temperature Actuator - Auxiliary (C69)


Object Number: 281207 Size: CH

Connector Part Information
    • 12040953
    • 6-Way F Micro-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

5-6

--

--

Not Used

7

BLK

850

Ground

8

ORN

2775

Auxiliary Air Temperature Door Control

9

--

--

Not Used

10

BRN

341

Ignition 3 Voltage

Blower Motor


Object Number: 684799 Size: CH

Connector Part Information
    • 12077900
    • 2-Way F Metri-Pack 280 Series- Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

1250

Ground

B

PPL

65

Blower Motor Supply Voltage

Blower Motor - Auxiliary (C36/C69)


Object Number: 684799 Size: CH

Connector Part Information
    • 12077900
    • 2-Way F Metri-Pack 280 Series- Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

850

Ground

B

YEL

1172

Auxiliary Blower Motor Supply Voltage

Blower Motor Resistor Assembly


Object Number: 535914 Size: CH

Connector Part Information
    • 12160746
    • 6-Way F Metri-Pack 280 Series- Flexlock- Sealed (LT GRY)

Pin

Wire Color

Circuit No.

Function

A

RED/BLK

542

Battery Positive Voltage

B

ORN

52

Blower Motor High Control

C

BLK

1250

Ground

D

TAN

63

Blower Motor Medium 1 Control

E

YEL

60

Blower Motor Low Control

F

LT BLU

72

Medium 2 Blower Motor Control

Blower Motor Resistor Assembly - Auxiliary (C36/C69)


Object Number: 816184 Size: CH

Connector Part Information
    • 12129566
    • 4-Way F Metri-Pack 280 Series- Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

A

YEL

1176

Auxiliary Blower Motor Low Control

B

--

--

Not Used

C

LT BLU

1072

Auxiliary Blower Motor Medium Control

D

YEL

1172

Auxiliary Blower Motor Supply Voltage

Blower Motor Switch - Auxiliary (C36 w/o C69)


Object Number: 62456 Size: CH

Connector Part Information
    • 12064752
    • 6-Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN/WHT

230

Instrument Panel Lamps Dimming Control

B

BLK

450

Ground

C

--

--

Not Used

D

WHT

1924

Auxiliary Blower Motor High Control

E

DK BLU

1926

Auxiliary Blower Motor Low Control

F

ORN

1925

Auxiliary Blower Motor Medium Control

HVAC Control Assembly - C1


Object Number: 68737 Size: CH

Connector Part Information
    • 12129489
    • 3-Way F Metri-Pack 280 Series- Flexlock (BLK)

Pin

Wire Color

Circuit No.

Function

A

WHT

119

Blower Motor Switch Supply Voltage

B

BLK

550

Ground

C

BRN/WHT

230

Instrument Panel Lamps Dimming Control

HVAC Control Assembly - C2


Object Number: 62469 Size: CH

Connector Part Information
    • 12064998
    • 8-Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

YEL

60

Blower Motor Low Control

B

TAN

63

Blower Motor Medium 1 Control

C

LT BLU

72

Medium 2 Blower Motor Control

D

ORN

52

Blower Motor High Control

E

BRN

141

Ignition 3 Voltage

F

LT BLU

733

Air Temperature Door Control

G

WHT

119

Blower Motor Switch Supply Voltage

H

LT GRN

66

A/C Request Signal

HVAC Control Assembly - C3 (C49/DE5/DE7)


Object Number: 62450 Size: CH

Connector Part Information
    • 12052856
    • 4-Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

RED/WHT

4440

Battery Positive Voltage

B

BRN

341

Ignition 3 Voltage

C

BLK

550

Ground

D

WHT

193

Rear Defog Relay Supply Voltage

HVAC Control Assembly - Front Auxiliary (Rear Auxiliary Controls)


Object Number: 62464 Size: CH

Connector Part Information
    • 12064769
    • 10-Way F Metri-Pack 150 Series (NAT)

Pin

Wire Color

Circuit No.

Function

A

BRN/WHT

230

Instrument Panel Lamps Dimming Control

B

BLK

450

Ground

C

DK BLU

1926

Auxiliary Blower Motor Low Control

D

WHT

1924

Auxiliary Blower Motor High Control

E

ORN

1925

Auxiliary Blower Motor Medium Control

F

YEL

5262

Front Auxiliary Blower Motor Switch Control

G

BRN

341

Ignition 3 Voltage

H

PPL

5260

Front Auxiliary Air Temperature Door Control

J

TAN

5261

Front Auxiliary Mode Door Control

K

--

--

Not Used

HVAC Control Assembly - Front Auxiliary (w/o Rear Auxiliary Controls)


Object Number: 803688 Size: CH

Connector Part Information
    • 12064871
    • 10-Way F Metri-Pack 150 Series (BLU)

Pin

Wire Color

Circuit No.

Function

A

BRN/WHT

230

Instrument Panel Lamps Dimming Control

B

BLK

450

Ground

C

DK BLU

1926

Auxiliary Blower Motor Low Control

D

WHT

1924

Auxiliary Blower Motor High Control

E

ORN

1925

Auxiliary Blower Motor Medium Control

F

BLK

450

Ground

G

BRN

341

Ignition 3 Voltage

H

ORN

2775

Auxiliary Air Temperature Door Control

J

GRY

2599

Auxiliary Mode Door Control

K

--

--

Not Used

HVAC Control Assembly - Rear Auxiliary (Rear Auxiliary Controls)


Object Number: 803688 Size: CH

Connector Part Information
    • 12064871
    • 10-Way F Metri-Pack 150 Series (BLU)

Pin

Wire Color

Circuit No.

Function

A

BRN/WHT

230

Instrument Panel Lamps Dimming Control

B

BLK

450

Ground

C

DK BLU

1926

Auxiliary Blower Motor Low Control

D

WHT

1924

Auxiliary Blower Motor High Control

E

ORN

1925

Auxiliary Blower Motor Medium Control

F

PNK/BLK

5265

Rear Auxiliary Blower Motor Switch Control

G

BRN

341

Ignition 3 Voltage

H

BRN

5263

Rear Auxiliary Air Temperature Door Control

J

PPL/WHT

5264

Rear Auxiliary Mode Door Control

K

--

--

Not Used

HVAC Control Processor - Auxiliary (Rear Auxiliary Controls)


Object Number: 328486 Size: CH

Connector Part Information
    • 12040747
    • 12-Way P/C Edgeboard - Standard (BLK)

Pin

Wire Color

Circuit No.

Function

A

PPL

5260

Front Auxiliary Air Temperature Door Control

B

ORN

2775

Auxiliary Air Temperature Door Control

C

BRN

5263

Rear Auxiliary Air Temperature Door Control

D

PPL/WHT

5264

Rear Auxiliary Mode Door Control

E

TAN

5261

Front Auxiliary Mode Door Control

F

GRY

2599

Auxiliary Mode Door Control

G

--

--

Not Used

H

BLK

450

Ground

J

BRN

341

Ignition 3 Voltage

K

--

--

Not Used

L

PNK/BLK

5265

Rear Auxiliary Blower Motor Switch Control

M

YEL

5262

Front Auxiliary Blower Motor Switch Control

High Speed Blower Motor Relay - Auxiliary (C36/C69)


Object Number: 309518 Size: CH

Connector Part Information
    • 12129715
    • 6-Way F Metri-Pack 280 Series- Flexlock (GRY)

Pin

Wire Color

Circuit No.

Function

A1

WHT

1924

Auxiliary Blower Motor High Control

A2

YEL

1172

Auxiliary Blower Motor Supply Voltage

B1-B2

--

--

Not Used

C1

RED/WHT

1740

Battery Positive Voltage

C2

BRN

341

Ignition 3 Voltage

Low Speed Blower Motor Relay - Auxiliary (C36/C69)


Object Number: 309518 Size: CH

Connector Part Information
    • 12129715
    • 6-Way F Metri-Pack 280 Series- Flexlock (GRY)

Pin

Wire Color

Circuit No.

Function

A1

DK BLU

1926

Auxiliary Blower Motor Low Control

A2

YEL

1176

Auxiliary Blower Motor Low Control

B1-B2

--

--

Not Used

C1

RED/WHT

1740

Battery Positive Voltage

C2

BRN

341

Ignition 3 Voltage

Med Speed Blower Motor Relay - Auxiliary (C36/C69)


Object Number: 309518 Size: CH

Connector Part Information
    • 12129715
    • 6-Way F Metri-Pack 280 Series- Flexlock (GRY)

Pin

Wire Color

Circuit No.

Function

A1

ORN

1925

Auxiliary Blower Motor Medium Control

A2

LT BLU

1072

Auxiliary Blower Motor Medium Control

B1-B2

--

--

Not Used

C1

RED/WHT

1740

Battery Positive Voltage

C2

BRN

341

Ignition 3 Voltage

Mode Actuator - Auxiliary (C69)


Object Number: 281207 Size: CH

Connector Part Information
    • 12040953
    • 6-Way F Micro-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

5-6

--

--

Not Used

7

BLK

850

Ground

8

GRY

2599

Auxiliary Mode Door Control

9

--

--

Not Used

10

BRN

341

Ignition 3 Voltage