NO ENGINE OIL PRESSURE (REPLACE OIL PUMP). Cadillac Allante 1993

For 1990-2009 cars

# NO ENGINE OIL PRESSURE (REPLACE OIL PUMP)

THIS BULLETIN IS BEING REVISED TO INFORM "NAES" DEALERS THAT THEY ARE NOT AUTHORIZED TO UTILIZE THIS SERVICE BULLETIN.

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"NAES" DEALERS ARE NOT AUTHORIZED TO UTILIZE THIS SERVICE BULLETIN.

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REVISON: 05/04/94

THIS BULLETIN IS BEING REVISED TO CORRECT THE PARTS RETURN INFORMATION. PLEASE DISCARD BULLETIN 316110. --------------------------------------------------------------------

#### SUBJECT: NO ENGINE OIL PRESSURE (REPLACE ENGINE OIL PUMP)

#### MODELS: 1993 CADILLAC ALLANTES 1993-94 CADILLAC ELDORADOS AND SEVILLES 1994 CADILLAC DE VILLE CONCOURS WITH 4.6L NORTHSTAR ENGINE - VIN CODES 9 AND Y

#### CONDITION:

SOME OWNERS MAY EXPERIENCE A COMPLETE LACK OF ENGINE OIL PRESSURE AS INDICATED BY THE ILLUMINATION OF THE STOP ENGINE OIL PRESSURE MESSAGE ON THE DRIVER INFORMATION CENTER. CONFIRMATION OF THIS CONDITION SHOULD BE BY ACTUAL PRESSURE MEASUREMENT WITH A MECHANICAL GAGE.

#### CAUSE:

THE PRESENCE OF DEBRIS BETWEEN THE OIL PRESSURE RELIEF VALVE AND ITS SEAT WILL PREVENT OIL PRESSURE BUILDUP. THE PRESSURE RELIEF VALVE IS INTERNAL TO THE ENGINE OIL PUMP.

#### CORRECTION:

REPLACE THE ENGINE OIL PUMP, P/N 3543258, FOLLOWING THE PROCEDURES IN SECTION 6A1 OF THE 1993 ELDORADO/SEVILLE SERVICE INFORMATION MANUAL.

DEFECTIVE PUMPS SHOULD BE RETURNED THROUGH THE CORPORATE PARTS RETURN PROGRAM TO THE ADDRESS BELOW. REFER TO BULLETIN 91-I-44 FOR RETURN AND REIMBURSEMENT PROCEDURES.

STANADYNE AUTOMOTIVE 92 DEERFIELD ROAD WINDSOR, CT 06095 ATT: MIKE WILLIAMS-POWER PRODUCTS GROUP

CANADIAN DEALERS RETURN DEFECTIVE PUMPS, POSTAGE PRE-PAID TO:

GENERAL MOTORS OF CANADA LTD. TECHNICAL ASSISTANCE CAR CHASSIS (163-010) 1908 COLONEL SAM DR. OSHAWA, ONTARIO L1H8P7

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

#### WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE: LABOR OPERATION J1020 USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 0

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 CADILLAC MOTOR CAR DIVISION, GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.