For 1990-2009 cars

# WATER CONTAMINATION IN ECM CONNECTOR

********************************************************************** REVISION 12/15/93

THIS BULLETIN REPLACES PREVIOUS BULLETIN. PREVIOUS BULLETIN ADDRESSED TEMPORARY FIX. THIS BULLETIN PROVIDES A PERMANENT FIX. THE 1994 MODEL YEAR IS ALSO NOW INCLUDED.

---------------------------------------------------------------------- REVISION 09/27/93

THIS BULLETIN IS BEING REVISED TO CORRECT WARRANTY INFORMATION. ARTWORK REMAINS THE SAME.

PREVIOUS DIVISIONAL PUBLICATION NUMBERS WERE:

BUICK 93-6E-18 OLDSMOBILE 93-T-79 PONTIAC 93-8-20 GM OF CANADA 93-8A-123 **********************************************************************

#### SUBJECT: CORROSION IN ECM CONNECTOR (RESEAL ENGINE HARNESS PASS-THROUGH TO FRONT OF DASH)

#### MODELS: 1992-94 BUICK SKYLARK 1992-94 PONTIAC GRAND AM 1992-94 OLDSMOBILE ACHIEVA

#### CONDITION:

SOME OWNERS MAY EXPERIENCE VARIOUS DRIVEABILITY SYMPTOMS.

#### CAUSE:

SOME VEHICLES MAY HAVE ENGINE HARNESS PASS-THROUGH LEAKING BETWEEN THE GASKET AND FRONT OF DASH, OR BETWEEN WIRES IN THE ENGINE HARNESS PASS-THROUGH. SOME ENGINE HARNESS PASS-THROUGH BODIES TO FRONT OF DASH MAY ALLOW MOISTURE TO PENETRATE BETWEEN THE WIRES OR AROUND THE CONNECTOR GASKET. MOISTURE MAY CONTAMINATE OR CORRODE THE ECM CONNECTORS.

#### CORRECTION:

RESEAL THE ENGINE HARNESS PASS-THROUGH USING THE FOLLOWING PROCEDURE:

1. OPEN HOOD.

2. REMOVE SCREWS SECURING THE ENGINE HARNESS PASS-THROUGH TO FRONT OF DASH - RIGHT HAND CORNER NEAR RIGHT FENDER.

3. GENTLY PULL HARNESS UPWARD ENOUGH TO ALLOW ACCESS TO HARNESS PASS- THROUGH SEALING SURFACES, BEING CAREFUL NOT TO PINCH OR STRESS HARNESS WIRES.

4. APPLY A THIN COAT OF URETHANE SEALER, P/N 12345633, OR EQUIVALENT, TO THE SEALING SURFACE OF ENGINE HARNESS PASS-THROUGH. BE SURE GASKET IS IN PLACE BEFORE REASSEMBLY.

5. REINSTALL HARNESS PASS-THROUGH AND INSTALL SCREWS. TORQUE TO 2 N.M (17 LBS. IN.).

6. REMOVE ENOUGH ELECTRICAL TAPE FROM ENGINE HARNESS END OF PASS- THROUGH TO EXPOSE PASS THROUGH PLASTIC BASE AND ALL WIRES TO THE POINT OF WHERE THE GLUE STOPS.

7. USE URETHANE SEALER, P/N 12345633, OR EQUIVALENT, AND SEAL WIRE BUNDLE TO PASS-THROUGH PLASTIC BASE AS SHOWN IN FIGURE 1. ALSO SEAL BETWEEN ANY WIRES NOT SEALED BY THE CLEAR HOT MELT GLUE.

8. RE-TAPE HARNESS UP TO AND SURROUNDING THE PLASTIC SHELL OF HARNESS PASS-THROUGH WITH ELECTRICAL TAPE.

9. CLOSE HOOD.

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

#### WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION NUMBER: T3378 LABOR TIME: .4

FIGURES: 1

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

COPYRIGHT 1993 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.