GM Service Manual Online
For 1990-2009 cars only

Engine Control Module Connector End Views Alternative Fuels

Table 1: Blue C001 32 Pin Connector End View
Table 2: Red C002 32 Pin Connector End View
Table 3: Gray/White/Clear C003 32 Pin Connector End View

Blue C001 32 Pin Connector End View


Object Number: 358772  Size: CF

Connector (Blue) Part Information

    • Connector - 12129025
    • Terminal - 12084912
    • Seal - 12129026
    • TPA (BLU) - 12129023

Pin

Wire Color

Circuit No.

Function

1

YEL

2534

Serial Data

2

DK GRN/WHT

428

EVAP Purge Input

3

LT BLU/WHT

1747

IAC Coil A High Input

4

LT GRN/WHT

1749

IAC Coil B High Input

5-6

--

--

Not Used

7

BLK/WHT

771

PRND A Signal Input

8

YEL

772

PRND B Signal Input

9

GRY

773

PRND C Signal Input

10

WHT

776

PRND P Signal Input

11-13

--

--

Not Used

14

PNK

639

AF ECM Power Supply - Ignition

15

DK GRN/WHT

817

Vehicle Speed Input

16

WHT

924

Production Use - Serial Data Transmit

17

YEL

492

Mass Air Flow (MAF) Sensor Signal Input

18

DK BLU/WHT

1869

Crankshaft Position Sensor (CKP) Signal Input

19

--

--

Not Used

20

BRN/WHT

633

Camshaft Position Sensor (CMP) Signal Input

21

--

--

Not Used

22

BRN

919

MIL Control Input

23-31

--

--

Not Used

32

DK GRN

923

Production Use - Serial Data Receive

Red C002 32 Pin Connector End View


Object Number: 358772  Size: CF

Connector (Red) Part Information

    • Connector - 12129025
    • Terminal - 12084912
    • Seal - 12129026
    • TPA (RED) - 12129024

Pin

Wire Color

Circuit No.

Function

1

PPL/WHT

1665

Bank 1 Sensor 1 HO2S High Signal Input

2

TAN/WHT

1653

Bank 1 Sensor 1 HO2S Low Signal Input

3

PPL

1666

Bank 2 Sensor 1 HO2S High Signal Input

4

TAN

1667

Bank 2 Sensor 1 HO2S Low Signal Input

5

PPL/WHT

1668

Bank 1 Sensor 2 HO2S High Signal Input

6

TAN/WHT

1669

Bank 1 Sensor 2 HO2S Low Signal Input

7

PPL

1670

Bank 2 Sensor 2 HO2S High Signal Input

8

TAN

1671

Bank 2 Sensor 2 HO2S Low Signal Input

9

YEL

410

Engine Coolant Temperature (ECT) Sensor Signal Input

10

TAN

472

Intake Air Temperature (IAT) Sensor Signal Input

11

LT GRN

432

Manifold Absolute Pressure (MAP) Sensor Signal Input

12

DK BLU

417

Throttle Position (TP) Sensor Signal Input

13

BRN

1456

Exhaust Gas Recirculation (EGR) Pintle Position Signal Input

14

GRY

970

Fuel Tank Level Sensor Signal Input (KL7)

15

--

--

Not Used

16

ORG

931

5 Volt Reference Output

17-22

--

--

Not Used

23

BRN

929

Fuel Tank Temperature (FTT) Sensor Signal Input

24

GRY

932

Fuel Tank Pressure (FTP) Sensor Signal Input

25

RED

948

Fuel Rail Temperature (FRT) Sensor Signal Input

26

PPL/WHT

949

Fuel Rail Pressure (FRP) Sensor Signal Input

27

--

--

Not Used

28

ORN/BLK

469

5 Volt Reference Low Input supplied from PCM

29

GRY

474

5 Volt Reference High Input supplied from PCM

30-31

--

--

Not Used

32

DK BLU

930

FRT, FRP, FTT, FTP Sensor Ground

Gray/White/Clear C003 32 Pin Connector End View


Object Number: 358779  Size: CF

Connector (Gray/White/Clear) Part Information

    • Connector - 12129025
    • Terminal - 12084912
    • Seal - 12129026
    • TPA (CLR) - 12129022

Pin

Wire Color

Circuit No.

Function

1-4

BLK

450

AF ECM Power Supply - Ground

5

LT GRN

913

High Pressure Lock-Off (HPL) Solenoid Control

6

LT BLU

901

Low Pressure Lock-Off (LPL) Solenoid Control

7

YEL

950

Fuel Injector 1 Control

8

GRN

951

Fuel Injector 2 Control

9

GRY

952

Fuel Injector 3 Control

10

TAN

953

Fuel Injector 4 Control

11

ORG

954

Fuel Injector 5 Control

12

WHT

955

Fuel Injector 6 Control

13

PPL

956

Fuel Injector 7 Control

14

BLU

957

Fuel Injector 8 Control

15

PNK

1020

AF ECM Power Supply - Ignition 0

16

ORN

440

AF ECM Power Supply - Battery

17

BLK

450

AF ECM Power Supply - Ground

18

TAN

960

LPG Fuel Tank Coolant Lock-off Control (KL7)

19

--

--

Not Used

20

BLK

925

Production Use - Serial Data Ground

21-23

--

--

Not Used

24

BRN/WHT

419

Malfunction Indicator Lamp (MIL) Control

25

RED

2531

Alternative Fuel Operation (AFO) Signal Command Control

26

WHT/BLK

2029

LPG Wait to Drive Indicator Control (KL7)

27

DK GRN

2532

EVAP Canister Purge Enable Control

28

DK BLU

1936

Alternative Fuel Level Control

29

--

--

Not Used

30

BLK

905

AF Fuel Pump Relay Control

31

ORG

440

AF ECM Power Supply - Battery

32

RED

926

Production Use- Serial Data Power