For 1990-2009 cars

# DTC P0400 SET (INSTALL FLASH CALIBRATION)

#### SUBJECT: DTC P0400 SET (INSTALL FLASH CALIBRATION)

#### MODELS: 1996 CADILLAC FLEETWOOD LIMOUSINES WITH 5.7L ENGINE (VIN P - RPO LT1) AND 4L60-E TRANSMISSION WITH RPO OPTIONS V4U AND B9Q

#### CONDITION:

SOME VEHICLES WITH LIMOUSINE STRETCH PACKAGES MAY SET A DTC P0400.

#### CAUSE:

THE STRETCH LIMOUSINE PACKAGE HAS A LESS RESTRICTIVE EXHAUST SYSTEM. THE EXHAUST SYSTEM CAUSES THE EXHAUST BACK PRESSURE VALUES TO BE SLIGHTLY LOWER WHICH EFFECTS THE EGR (EXHAUST GAS RECIRCULATION) CALIBRATION.

#### CORRECTION:

INSTALL FLASH CALIBRATION LISTED.

NEW OLD AXLE CALIBRATION CALIBRATION TYPE APPLICATION EMISSIONS -------------------------------------------------------------- 16253681 16236651 2.93 LIMO NATIONWIDE 16253691 16243891 2.93 LIMO CANADA

#### WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION: J6355 LABOR TIME: USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 0 ATTACHMENTS: 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 1997. GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.