GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (BCM) -X1
Table 2: Body Control Module (BCM) -X2
Table 3: Body Control Module (BCM) -X3
Table 4: Body Control Module (BCM) -X4
Table 5: Body Control Module (BCM) -X5
Table 6: Body Control Module (BCM) -X6
Table 7: Body Control Module (BCM) -X7
Table 8: Data Link Connector (DLC)
Table 9: Instrument Panel Data Link Connector

Body Control Module (BCM) -X1


Object Number: 1989630  Size: CH

Connector Part Information

 

Pin

Wire Colour

Wire Size

Function

X1-1

--

--

Not Used

X1-2

WH

0.3

Ignition Key Resistor Low Reference

X1-3

GY

0.3

Cruise Control Switch Signal

X1-4

WH/BK

0.3

Ignition Key Resistor Signal

X1-5

L-GN

0.3

Windshield Wiper Switch High Signal

X1-6

--

--

Not Used

X1-7

--

--

Not Used

X1-8

BK/WH

0.3

Wiper Switch Low Reference

X1-9

L-BU

0.3

Windshield Wiper Switch Low Signal

X1-10

--

--

Not Used

X1-11

--

--

Not Used

X1-12

--

--

Not Used

X1-13

--

--

Not Used

X1-14

PK

0.3

Run/Crank Voltage

X1-15

L-BU/WH

0.3

Left Turn Signal Switch Signal

X1-16

D-BU/WH

0.3

Right Turn Signal Switch Signal

X1-17

PU

0.3

Steering Wheel Control Supply Voltage

X1-18

PU/YE

0.3

Headlamp Dimmer Switch High Beam Signal

X1-19

--

--

Not Used

X1-20

PU/RD

0.3

Transmission Electronic Range Select Signal

X1-21

BN

0.3

Ignition 1 Voltage

X1-22

--

--

Not Used

X1-23

YE

0.5

Left Tail Lamp Monitoring (HSV)

X1-24

OG

0.3

Windshield Washer Switch Signal

X1-25

BN/RD

0.3

Flash To Pass Switch Signal

X1-26

--

--

Not Used

X1-27

--

--

Not Used

Body Control Module (BCM) -X2


Object Number: 1989633  Size: CH

Connector Part Information

 

Pin

Wire Colour

Wire Size

Function

X2-1

OG

0.85

Inadvertent Power Supply Voltage

X2-2

OG/BU

0.85

Battery Positive Voltage

X2-3

GY

0.85

Instrument Panel Lamp Supply Voltage

X2-4

--

--

Not Used

X2-5

D-BU/WH

0.85

Courtesy Lamp Supply Voltage

X2-6

--

--

Not Used

X2-7

--

--

Not Used

X2-8

BN/WH

0.3

Park Lamp Switch On Signal

X2-9

--

--

Not Used

X2-10

D-BU

0.3

Rear Compartment Relay Switch

X2-11

L-GN/BK

0.3

DRL Ambient Light Sensor Signal

X2-12

WH

0.3

Headlamp Switch Headlamps On Signal

X2-13

--

--

Not Used

X2-14

--

--

Not Used

X2-15

--

--

Not Used

X2-16

--

--

Not Used

X2-17

D-GN

0.3

Headlamp Switch Headlamps Off Signal

X2-18

PK/BK

0.3

Courtesy Lamps Switch Signal

X2-19

--

--

Not Used

X2-20

L-BU

0.5

Tow/Haul Switch Signal

X2-21

BN/OG

0.3

Traction Control Switch Signal

X2-22

D-GN/WH

0.3

A/T Shift Lock Control Solenoid Supply Voltage

X2-23

--

--

Not Used

X2-24

--

--

Not Used

X2-25

PU

0.3

Interior Lamp Switch Signal

Body Control Module (BCM) -X3


Object Number: 1989634  Size: CH

Connector Part Information

 

Pin

Wire Colour

Wire Size

Function

X3-1

BK

0.85

Ground

X3-2

OG/YE

0.85

Battery Positive Voltage

X3-3

OG/RD

0.85

Battery Positive Voltage

X3-4

--

--

Not Used

X3-5

BK

0.85

Ground

X3-6

--

--

Not Used

X3-7

GY

0.3

Security Indicator Control

X3-8

BN/BK

0.5

High Speed GMLAN Serial Data Bus+

X3-9

BN

0.5

High Speed GMLAN Serial Data Bus-

X3-10

D-GN

0.3

Low Speed GMLAN Serial Data

X3-11

--

--

Not Used

X3-12

--

--

Not Used

X3-13

L-GN

0.5

Stop Lamp Switch Signal

X3-14

BN/RD

0.5

Low Reference

X3-15

GY

0.5

5-Volt Reference

X3-16

BN/BK

0.5

High Speed GMLAN Serial Data Bus+

X3-17

BN

0.5

High Speed GMLAN Serial Data Bus-

X3-18

YE

0.3

LED Backlight Dimming Control

X3-19

PU/WH

0.3

Communication Enable Relay Control

X3-20

--

--

Not Used

X3-21

OG

0.3

Fog Lamp Switch

X3-22

--

--

Not Used

X3-23

--

--

Not Used

X3-24

--

--

Not Used

X3-25

PU/WH

0.3

RPA Switch LED Backlight Dimming Control

Body Control Module (BCM) -X4


Object Number: 1989636  Size: CH

Connector Part Information

 

Pin

Wire Colour

Wire Size

Function

X4-1

OG/RD

0.85

Battery Positive Voltage

X4-2

OG

0.85

Battery Positive Voltage

X4-3

OG/PU

0.85

Battery Positive Voltage

X4-4

OG/PU

0.85

Battery Positive Voltage

X4-5

D-BU/WH

0.75

Right Front Turn Signal Lamp Supply Voltage

X4-6

--

--

Not Used

X4-7

YE

0.3

Windshield Wiper Motor Park Switch Signal

X4-8

--

--

Not Used

X4-9

BK

0.3

Ground

X4-10

OG/BU

0.3

Battery Positive Voltage

X4-11

D-GN/WH

0.3

Fog Lamp Relay - Coil - Output

X4-12

--

--

Not Used

X4-13

--

--

Not Used

X4-14

L-GN

0.3

Outside Moisture Sensor Signal 2

X4-15

OG

0.5

Washer Fluid Pump Relay Control

X4-16

BN/YE

0.3

Headlamp High Beam Relay Control

X4-17

PK/BK

0.3

Hood Ajar Switch Signal

X4-18

BN

0.3

Outside Moisture Sensor Signal 1

X4-19

D-BU

0.3

TCM Accessory Signal

X4-20

YE

0.35

Fog Lamp Relay - Coil - Output - Rear

X4-21

PK

0.3

Run/Crank Control

X4-22

BN

0.3

Trunk Release Relay Control

X4-23

--

--

Not Used

X4-24

D-GN

0.3

Backup Lamp Relay Control

X4-25

--

--

Not Used

Body Control Module (BCM) -X5


Object Number: 1989638  Size: CH

Connector Part Information

 

Pin

Wire Colour

Wire Size

Function

X5-1

YE/BK

0.85

Left Rear Turn Signal Lamp Supply Voltage

X5-2

D-GN/WH

0.85

Right Rear Turn Signal Lamp Supply Voltage

X5-3

--

--

Not Used

X5-4

L-BU/WH

0.75

Left Front Turn Signal Lamp Supply

X5-5

BN

0.85

Puddle Lamp Supply Voltage

X5-6

WH/BU

0.5

Stop Lamp Switch Signal

X5-7

--

--

Not Used

X5-8

PK

0.3

5-Volt Reference

X5-9

WH/GN

0.3

Battery Current Signal

X5-10

BN

0.3

Low Reference

X5-11

BN/YE

0.3

RAP Relay Coil Supply Voltage

X5-12

--

--

Not Used

X5-13

--

--

Not Used

X5-14

YE

0.3

Accessory Power Relay Control

X5-15

PU

0.3

Hood Closed Switch Signal

X5-16

OG/BK

0.5

Park Brake Switch Signal

X5-17

PU

0.5

Right Tail Lamp Monitoring (HSV)

X5-18

BN/BK

0.3

Horn Relay Control

X5-19

--

--

Not Used

X5-20

GY

0.3

Windshield Wiper Switch Signal 2

X5-21

BN/RD

0.3

Front Windshield Wiper Switch High Signal

X5-22

--

--

Not Used

X5-23

PK/WH

0.3

Headlamp Low Beam Relay Control

X5-24

WH/YE

0.3

Park Lamp Relay Control

X5-25

--

--

Not Used

Body Control Module (BCM) -X6


Object Number: 1989640  Size: CH

Connector Part Information

 

Pin

Wire Colour

Wire Size

Function

X6-1

--

--

Not Used

X6-2

L-BU

1.25

Stop Lamp Supply Voltage

X6-3

--

--

Not Used

X6-4

--

--

Not Used

X6-5

--

--

Not Used

X6-6

--

--

Not Used

X6-7

--

--

Not Used

X6-8

BN/WH

0.3

Passenger Front Door Ajar Switch Signal

X6-9

--

--

Not Used

X6-10

GY/BK

0.3

Driver Door Ajar Switch Signal

X6-11

--

--

Not Used

X6-12

--

--

Not Used

X6-13

--

--

Not Used

X6-14

--

--

Not Used

X6-15

--

--

Not Used

X6-16

--

--

Not Used

X6-17

--

--

Not Used

X6-18

--

--

Not Used

X6-19

--

--

Not Used

X6-20

PK

0.3

Driver Door Lock Switch Unlock Signal

X6-21

--

--

Not Used

X6-22

OG/BK

0.3

Liftgate Ajar Switch Signal

X6-23

PK/BK

0.3

Driver Door Lock Switch Lock Signal

X6-24

--

--

Not Used

X6-25

--

--

Not Used

Body Control Module (BCM) -X7


Object Number: 1989640  Size: CH

Connector Part Information

 

Pin

Wire Colour

Wire Size

Function

X7-1

--

--

Not Used

X7-2

WH

0.3

Headlamp Washer Relay Control

X7-3

--

--

Not Used

X7-4

--

--

Not Used

X7-5

--

--

Not Used

X7-6

L-BU

0.3

Driver Door / Fuel Door Unlock Control

X7-7

BU/WH

0.3

Door Lock Relay Control

X7-8

--

--

Not Used

X7-9

WH

0.3

Door Unlock Control

X7-10

GY/BU

0.3

Dimmer Control Up Signal

X7-11

BN/BK

0.3

Rear Door Lock Switch Unlock Signal

X7-12

GY/BK

0.3

Rear Door Lock Switch Lock Signal

X7-13

--

--

Not Used

X7-14

--

--

Not Used

X7-15

--

--

Not Used

X7-16

L-BU

0.35

Fog Lamp Switch - Output - Rear

X7-17

--

--

Not Used

X7-18

--

--

Not Used

X7-19

--

--

Not Used

X7-20

--

--

Not Used

X7-21

--

--

Not Used

X7-22

--

--

Not Used

X7-23

--

--

Not Used

X7-24

GY/WH

0.3

Dimmer Control Down Signal

X7-25

--

--

Not Used

Data Link Connector (DLC)


Object Number: 1989641  Size: CH

Connector Part Information

Metri-Pack 150 Series

Pin

Wire Colour

Wire Size

Function

1

L-GN

0.3

Low Speed GMLAN Serial Data

2

--

--

Not Used

3

--

--

Not Used

4

BK

0.3

Ground

5

BK

0.3

Ground

6

BN/BK

0.5

High Speed GMLAN Serial Data Bus+

7

--

--

Not Used

8

--

--

Not Used

9

--

--

Not Used

10

--

--

Not Used

11

--

--

Not Used

12

--

--

Not Used

13

--

--

Not Used

14

BN

0.5

High Speed GMLAN Serial Data Bus-

15

--

--

Not Used

16

OG/WH

0.5

Battery Positive Voltage

Instrument Panel Data Link Connector


Object Number: 1989644  Size: CH

Connector Part Information

Metri-Pack 150 Series

Pin

Wire Colour

Wire Size

Function

A

D-GN

0.3

Low Speed GMLAN Serial Data

B

D-GN

0.3

Low Speed GMLAN Serial Data

C

D-GN

0.3

Low Speed GMLAN Serial Data

D

D-GN

0.3

Low Speed GMLAN Serial Data

E

D-GN

0.3

Low Speed GMLAN Serial Data

F

D-GN

0.3

Low Speed GMLAN Serial Data

G

D-GN

0.3

Low Speed GMLAN Serial Data

H

D-GN

0.3

Low Speed GMLAN Serial Data

J

D-GN

0.3

Low Speed GMLAN Serial Data

K

D-GN

0.3

Low Speed GMLAN Serial Data

L

D-GN

0.3

Low Speed GMLAN Serial Data

M

D-GN

0.3

Low Speed GMLAN Serial Data