For 1990-2009 cars

# INTERMITT. STALL (FLASH PCM WITH UPDATED

#### SUBJECT: INTERMITTENT STALL (FLASH PCM WITH UPDATED CALIBRATION)

#### MODELS: 1998 BUICK LESABRE, PARK AVE 1998 OLDSMOBILE EIGHTY EIGHT, EIGHTY EIGHT LS, LSS, REGENCY 1998 PONTIAC BONNEVILLE WITH 3.8L ENGINE (VIN K - RPO L36)

#### CONDITION:

A SMALL NUMBER OF OWNERS MAY COMMENT THAT THE ENGINE INTERMITTENTLY STALLS DURING A CLOSED THROTTLE DECELERATION FROM ABOUT 35 MPH (56 KM/H). AN EVEN SMALLER NUMBER OF OWNERS MAY COMMENT THAT THE ENGINE INTERMITTENTLY HESITATES OR STALLS WHEN ACCELERATING. THE ENGINE CAN BE IMMEDIATELY RESTARTED IN BOTH SITUATIONS. THE MALFUNCTION INDICATOR LAMP (MIL) MAY NOT ILLUMINATE AND NO DIAGNOSTIC TROUBLE CODE (DTC) MAY BE STORED WITHIN THE POWERTRAIN CONTROL MODULE (PCM). THE SERVICE TECHNICIAN MAY NOT BE ABLE TO DUPLICATE THE CONDITION.

#### CAUSE:

CALIBRATION WITHIN THE PCM MAY NOT CONTROL THE IDLE AIR CONTROL (IAC) VALVE OR PROCESS MASS AIR FLOW (MAF) SENSOR INFORMATION PROPERLY DURING THE CONDITION, RESULTING IN AN INTERMITTENT STALL.

#### CORRECTION:

1. IF A DTC IS PRESENT, THEN DIAGNOSE AND REPAIR AS REQUIRED BEFORE CONTINUING WITH THIS BULLETIN.

2. FLASH THE PCM WITH THE CALIBRATION LISTED UNDER THE CALIBRATION INFORMATION IN THIS BULLETIN.

#### CALIBRATION INFORMATION:

THE NEW CALIBRATIONS ARE AVAILABLE FOR TECHLINE TOOLS STARTING WITH THE 1998 CD 5 RELEASE FROM GM SERVICE TECHNOLOGY GROUP (STG).

DO NOT ATTEMPT TO ORDER THE CALIBRATION NUMBERS FROM GMSPO. THE CALIBRATIONS ARE PROGRAMMED INTO THE VEHICLE'S PCM VIA A TECHLINE TOOL DEVICE.

AXLE EMISSION CALIBRATION MAKE/MODEL RATIO STANDARDS ID

BUICK LESABRE 2.86 USA-FED CANADA 09361334 LESABRE 2.86 CALIFORNIA TLEV 09361344 LESABRE 2.86 UNLEADED EXPORT 09361354 LESABRE 3.05 USA-FED CANADA 09361364 LESABRE 3.05 CALIFORNIA TLEV 09361374 LESABRE 3.05 UNLEADED EXPORT 09361384 PARK AVE 3.05 USA-FED CANADA 09361284 PARK AVE 3.05 CALIFORNIA TLEV 09361294 PARK AVE 3.05 UNLEADED EXPORT 09361304

OLDSMOBILE 88,LS 2.86 USA-FED CANADA P225 TIRES 09361314 88,LS 2.86 CALIFORNIA TLEV P225 TIRES 09361324 88,LS,REGENCY 2.86 USA-FED CANADA P205/P215 TIRES 09361334 88,LS,REGENCY 2.86 CALIFORNIA TLEV P205/P215 TIRES 09361344 88,LS,REGENCY 2.86 UNLEADED EXPORT P205/P215 TIRES 09361354 LSS 3.05 USA-FED CANADA 09361364 LSS 3.05 CALIFORNIA TLEV 09361374 LSS 3.05 UNLEADED EXPORT 09361384

PONTIAC BONNEVILLE 2.86 USA-FED + CANADA 09361334 BONNEVILLE 2.86 CALIFORNIA TLEV 09361344 BONNEVILLE 2.86 UNLEADED EXPORT 09361354 BONNEVILLE 3.05 USA-FED + CANADA 09361364 BONNEVILLE 3.05 CALIFORNIA TLEV 09361374 BONNEVILLE 3.05 UNLEADED EXPORT 09361384

#### WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION DESCRIPTION LABOR TIME J6355 PROM- REPROGRAMMING USE PUBLISHED LABOR ON CAR 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.

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