GM Service Manual Online
For 1990-2009 cars only
Table 1: Data Link Connector (DLC)
Table 2: Diagnostic Tool Connector
Table 3: Serial Data Gateway
Table 4: Splice Pack SP203

Data Link Connector (DLC)


Object Number: 258625  Size: CH

Connector Part Information

    • 15317575
    • 16-Way (BK)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

PU

1132

DLC Class 2 Serial Data

3

--

--

Not Used

4

BK

750

Ground

5

BK/WH

1451

Ground

6

--

--

Not Used

7

TN/BK

1921

SAE J1708 Serial Data A (W/LG5)

8

BK/WH

1455

Keyless Entry Program Enable Signal

9-14

--

--

Not Used

15

WH/BK

1922

SAE J1708 Serial Data B (W/LG5)

16

OG

840

Battery Positive Voltage

Diagnostic Tool Connector


Object Number: 855174  Size: CH

Connector Part Information

    • 15324337
    • 9-Way F (BK)

Pin

Wire Color

Circuit No.

Function

A

BK

750

Ground w/LG4/JE4/MWF/M74/MX4/MTX/MTW

B

OG

840

Battery Positive Voltage

C

YE

2361

CAN Serial Data High (M74)

D

D-GN

2362

CAN Serial Data Low (M74)

E

--

--

Not Used

F

TN/BK

1921

SAE J1708 Serial Data A (LG5)

G

WH/BK

1922

SAE J1708 Serial Data B (LG5)

H

YE

2655

Ignition Sensor (MD Transmission)

J

L-BU

553

Tow/Haul Switch Signal (MD Transmission)

Serial Data Gateway


Object Number: 744296  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A1

D-BU

2362

CAN Serial Data Low

A2

YE

2361

CAN Serial Data High

A3

--

--

Not Used

A4

BK/WH

1451

Ground

A5

--

--

Not Used

A6

OG

440

Battery Positive Voltage

A7

--

--

Not Used

A8

RD/WH

2673

Serial Data Class 2

B1-B5

--

--

Not Used

B6

PK

1020

Off/Run/Crank Voltage

B7-B8

--

--

Not Used

Splice Pack SP203


Object Number: 338576  Size: CH

Connector Part Information

    • 12191216
    • 12-Way F Metri-Pack 150 Series (GY)

Pin

Wire Color

Circuit No.

Function

A

PU

1132

DLC Class 2 Serial Data

B

D-GN

1049

ECM/PCM/VCM Class 2 Serial Data

C

RD/WH

2673

Class 2 Serial Data (W/ L18)

D

OG

1044

Radio Class 2 Serial Data

E

L-BU

1122

ABS/TCS Class 2 Serial Data

F

D-BU

1128

SDM Class 2 Serial Data

G

GY

1036

IPC Class 2 Serial Data

H-J

--

--

Not Used

K

YE

2470

Serial Data Class 2

L

--

--

Not Used

M

D-BU/WH

653

Chime Module Bit1 Signal