GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Tahoe - 2WD 🢒 Body 🢒 Wiring Systems 🢒 HVAC Connector End Views
Table 1: A/C Compressor Clutch
Table 2: A/C Low Pressure Switch
Table 3: A/C Refrigerant Pressure Sensor
Table 4: Air Temperature Actuator - Left
Table 5: Air Temperature Actuator - Right
Table 6: Air Temperature Actuator - Auxiliary
Table 7: Blower Motor
Table 8: Blower Motor Resistor Assembly
Table 9: Blower Motor Resistor Assembly - Auxiliary - C1
Table 10: Blower Motor Resistor Assembly - Auxiliary - C2
Table 11: Blower Motor - Auxiliary, Short Wheelbase
Table 12: Blower Motor - Auxiliary, Long Wheelbase
Table 13: HVAC Control Module - C1
Table 14: HVAC Control Module - C2
Table 15: HVAC Control Assembly - Front Auxiliary - w/ A/C Only
Table 16: HVAC Control Assembly - Rear Auxiliary - w/ A/C Only
Table 17: HVAC Control Assembly - Front Auxiliary - w/ Heat and A/C
Table 18: HVAC Control Assembly - Rear Auxiliary - w/ Heat and A/C
Table 19: HVAC Control Processor - Auxiliary
Table 20: Mode Actuator
Table 21: Mode Actuator - Auxiliary
Table 22: Recirculation Actuator

A/C Compressor Clutch


Object Number: 684852 Size: CH

Connector Part Information
    • 12162017
    • 2-Way F Metri-Pack 150 Series (MD GY)

Pin

Wire Color

Circuit No.

Function

A

BK

550

Ground

B

D GN

59

A/C Compressor Clutch Supply Voltage

A/C Low Pressure Switch


Object Number: 537107 Size: CH

Connector Part Information
    • 12052644
    • 2-Way F Metri-Pack 150 Series (L GY)

Pin

Wire Color

Circuit No.

Function

A

D BU

204

A/C Low Pressure Sensor Signal

B

BK

550

Ground

A/C Refrigerant Pressure Sensor


Object Number: 726824 Size: CH

Connector Part Information
    • 15344137
    • 3-Way F GT 150 Sealed (BK)

Pin

Wire Color

Circuit No.

Function

1

BK

2751

Low Reference

2

GY

2700

5-Volt Reference

3

RD/BK

380

A/C Refrigerant Pressure Sensor Signal

Air Temperature Actuator - Left


Object Number: 280764 Size: CH

Connector Part Information
    • 12064993
    • 6-Way F Micro-Pack 100 Series (BK)

Pin

Wire Color

Circuit No.

Function

5

BN

341

Ignition 3 Voltage

6

D BU

1199

Left Air Temperature Door Control

7

YE

1791

Ground

8

--

--

Not Used

9

L BU

733

Air Temperature Door Position Signal

10

L BU/

BK

1688

5-Volt Reference

Air Temperature Actuator - Right


Object Number: 280764 Size: CH

Connector Part Information
    • 12064993
    • 6-Way F Micro-Pack 100 Series (BK)

Pin

Wire Color

Circuit No.

Function

5

BN

341

Ignition 3 Voltage

6

WH/BK

1236

Right Air Temperature Door Control

7

YE

1791

Ground

8

--

--

Not Used

9

D BU

1646

Right Air Temperature Door Position Signal

10

L BU/

BK

1688

5-Volt Reference

Air Temperature Actuator - Auxiliary


Object Number: 280764 Size: CH

Connector Part Information
    • 12064993
    • 6-Way F Micro-Pack 100 Series (BK)

Pin

Wire Color

Circuit No.

Function

5-6

--

--

Not Used

7

BK

1450

Ground

8

WH/BK

1236

Auxiliary Air Temperature Door Control

9

--

--

Not Used

10

BN

541

Ignition 3 Voltage

Blower Motor


Object Number: 62488 Size: CH

Connector Part Information
    • 12084957
    • 2-Way F Metri-Pack 280 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

RD

65

Blower Motor Supply Voltage

B

BK

1050

Ground

Blower Motor Resistor Assembly


Object Number: 73146 Size: CH

Connector Part Information
    • 12052854
    • 7-Way F Metri-Pack 280 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

TN

63

Medium 1 Blower Motor Control

B

YE

60

Blower Motor Low Control

C

PU

73

Medium 3 Blower Motor Control

D

L BU

72

Medium 2 Blower Motor Control

E

BK

1050

Ground

F

OG

52

Blower Motor High Control

G

RD

542

Battery Positive Voltage

Blower Motor Resistor Assembly - Auxiliary - C1


Object Number: 68737 Size: CH

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

Pin

Wire Color

Circuit No.

Function

A

D BU

1926

Auxiliary Blower Motor Low Control

B

RD

1925

Auxiliary Blower Motor Medium Control

C

WH

1924

Auxiliary Blower Motor High Control

Blower Motor Resistor Assembly - Auxiliary - C2


Object Number: 62450 Size: CH

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

Pin

Wire Color

Circuit No.

Function

A

BK

1450

Ground

B

OG

1740

Battery Positive Voltage

C

BN

541

Ignition 3 Voltage (w/Heat and A/C)

BN

541

Ignition 3 Voltage (w/Heat and A/C, long wheelbase only)

--

--

Not Used (w/ A/C only)

D

BN

541

Ignition 3 Voltage

Blower Motor - Auxiliary, Short Wheelbase


Object Number: 62488 Size: CH

Connector Part Information
    • 12084957
    • 2-Way F Metri-Pack 280 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

RD

65

Blower Motor Supply Voltage

B

BK

1050

Ground

Blower Motor - Auxiliary, Long Wheelbase


Object Number: 62488 Size: CH

Connector Part Information
    • 12084957
    • 2-Way F Metri-Pack 280 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

PU

65

Blower Motor Supply Voltage

B

BK

1050

Ground

HVAC Control Module - C1


Object Number: 130690 Size: CH

Connector Part Information
    • 12110206
    • 24-Way F Micro-Pack 100 (L BU)

Pin

Wire Color

Circuit No.

Function

A1

D GN

1614

Recirculation Door Control

A2

D BU

1646

Right Air Temperature Door Position Signal

A3

L BU

733

Left Air Temperature Door Position Signal

A4

--

--

Not Used

A5

L GN

2275

Mode Door Position Signal

A6

--

--

Not Used

A7

BN/WH

230

Instrument Panel Lamps Dimming Control

A8

BK

1851

Ground

A9-A10

--

--

Not Used

A11

D GN

71

OFF Blower Motor Control

A12

D BU

204

A/C Low Pressure Sensor Signal

B1

WH/BK

1236

Right Air Temperature Door Control

B2

D BU

1199

Left Air Temperature Door Control

B3

--

--

Not Used

B4

TN

2273

Mode Door Control

B5

BN

341

Ignition 3 Voltage

B6

YE

1791

Low Reference

B7

OG

4340

Battery Positive Voltage

B8

L BU/

BK

1688

5-Volt Reference

B9

BK

1050

Ground

B10

--

--

Not Used

B11

WH

1038

HVAC Class 2 Serial Data

B12

--

--

Not Used

HVAC Control Module - C2


Object Number: 556473 Size: CH

Connector Part Information
    • 15326924
    • 8-Way F GT 280 (BK)

Pin

Wire Color

Circuit No.

Function

A

PU

73

Medium 3 Blower Motor Control

B

L BU

72

Medium 2 Blower Motor Control

C

TN

63

Blower Motor Medium 1 Control

D

YE

60

Blower Motor Low Control

E

--

--

Not Used

F

OG

52

Blower Motor High Control

G

BN

141

Ignition 3 Voltage

H

D GN

71

OFF Blower Motor Control

HVAC Control Assembly - Front Auxiliary - w/ A/C Only


Object Number: 73152 Size: CH

Connector Part Information
    • 12110259
    • 16-Way F Micro-Pack 100 Series (GN)

Pin

Wire Color

Circuit No.

Function

A1

BN/WH

230

Instrument Panel Lamps Dimming Control

A2-A3

--

--

Not Used

A4

OG

1923

Rear Auxiliary Enable Control

A5

WH

1924

Auxiliary Blower Motor High Control

A6

RD

1925

Auxiliary Blower Motor Medium Control

A7

D BU

1926

Auxiliary Blower Motor Low Control

A8

BK

1450

Ground

B1-B8

--

--

Not Used

HVAC Control Assembly - Rear Auxiliary - w/ A/C Only


Object Number: 356307 Size: CH

Connector Part Information
    • 12092632
    • 16-Way F Micro-Pack 100 Series (RD)

Pin

Wire Color

Circuit No.

Function

A1

BN/WH

230

Instrument Panel Lamps Dimming Control

A2-A4

--

--

Not Used

A5

WH

1924

Auxiliary Blower Motor High Control

A6

RD

1925

Auxiliary Blower Motor Medium Control

A7

D BU

1926

Auxiliary Blower Motor Low Control

A8

BK

1450

Ground

B1

BN/WH

230

Instrument Panel Lamps Dimming Control

B2-B3

--

--

Not Used

B4

OG

1923

Rear Auxiliary Enable Control

B5

WH

1924

Auxiliary Blower Motor High Control

B6

RD

1925

Auxiliary Blower Motor Medium Control

B7

D BU

1926

Auxiliary Blower Motor Low Control

B8

BK

1450

Ground

HVAC Control Assembly - Front Auxiliary - w/ Heat and A/C


Object Number: 73152 Size: CH

Connector Part Information
    • 12084945
    • 16-Way F Micro-Pack 100 Series (GY)

Pin

Wire Color

Circuit No.

Function

A1

BN/WH

230

Instrument Panel Lamps Dimming Control

A2

--

--

Not Used

A3

L BU

733

Auxiliary Front Mode 1 Signal

A4

OG

1923

Rear Auxiliary Enable Control

A5

WH

1924

Auxiliary Blower Motor High Control

A6

RD

1925

Auxiliary Blower Motor Medium Control

A7

D BU

1926

Auxiliary Blower Motor Low Control

A8

BK

1450

Ground

B1

--

--

Not Used

B2

BN

541

Ignition 3 Voltage

B3

RD/BK

2822

Auxiliary Front Mode 1 Signal

B4-B8

--

--

Not Used

HVAC Control Assembly - Rear Auxiliary - w/ Heat and A/C


Object Number: 73152 Size: CH

Connector Part Information
    • 12092629
    • 16-Way F Micro-Pack 100 Series (BU)

Pin

Wire Color

Circuit No.

Function

A1

BN/WH

230

Instrument Panel Lamps Dimming Control

A2

BN

541

Ignition 3 Voltage

A3

BN

2383

Auxiliary Rear Mode 2 Signal

A4

--

--

Not Used

A5

WH

1924

Auxiliary Blower Motor High Control

A6

RD

1925

Auxiliary Blower Motor Medium Control

A7

D BU

1926

Auxiliary Blower Motor Low Control

A8

BK

1450

Ground

B1

BN/WH

230

Instrument Panel Lamps Dimming Control

B2

BN

541

Ignition 3 Voltage

B3

D BU

1646

Auxiliary Rear Air Temperature 2 Signal

B4

GY

778

Auxiliary Blower Motor Speed Control

B5

WH

1924

Auxiliary Blower Motor High Control

B6

RD

1925

Auxiliary Blower Motor Medium Control

B7

D BU

1926

Auxiliary Blower Motor Low Control

B8

BK

1450

Ground

HVAC Control Processor - Auxiliary


Object Number: 328486 Size: CH

Connector Part Information
    • 12040747
    • 12-Way P/C Edgeboard - STD (BK)

Pin

Wire Color

Circuit No.

Function

A

RD/BK

2822

Auxiliary Front Mode 1 Signal

B

WH/BK

1236

Auxiliary Air Temperature Door Control

C

D BU

1646

Auxiliary Rear Air Temperature 2 Signal

D

BN

2823

Auxiliary Rear Mode 2 Signal

E

L BU

733

Auxiliary Front Mode 1 Signal

F

WH

454

Auxiliary Mode Door Control

G

--

--

Not Used

H

BK

1450

Ground

BK

1450

Ground

J

BN

541

Ignition 3 Voltage

BN

541

Ignition 3 Voltage

K

--

--

Not Used

L

GY

778

Auxiliary Blower Motor Speed Control

M

OG

1923

Rear Auxiliary Enable Control

Mode Actuator


Object Number: 280764 Size: CH

Connector Part Information
    • 12064993
    • 6-Way F Micro-Pack 100 Series (BK)

Pin

Wire Color

Circuit No.

Function

5

BN

341

Ignition 3 Voltage

6

TN

2273

Mode Door Control

7

YE

1791

Low Reference

8

--

--

Not Used

9

L GN

2275

Mode Door Position Signal

10

L BU/BK

1688

5-Volt Reference

Mode Actuator - Auxiliary


Object Number: 280764 Size: CH

Connector Part Information
    • 12064993
    • 6-Way F Micro-Pack 100 Series (BK)

Pin

Wire Color

Circuit No.

Function

5-6

--

--

Not Used

7

BK

1450

Ground

8

WH

454

Auxiliary Mode Door Control

9

--

--

Not Used

10

BN

541

Ignition 3 Voltage

Recirculation Actuator


Object Number: 280764 Size: CH

Connector Part Information
    • 12064993
    • 6-Way F Micro-Pack 100 Series (BK)

Pin

Wire Color

Circuit No.

Function

5

BN

341

Ignition 3 Voltage

6

D GN

1614

Recirculation Door Control

7

BK

1050

Ground

8-10

--

--

Not Used