EGR DTC 32 (INSTALL NEW MEMCAL). GMC Truck Safari

SUBJECT: EGR DTC 32 (INSTALL NEW MEMCAL)

MODELS: 1995 CHEVROLET AND GMC M/L VANS WITH 4.3L ENGINE (VIN W - RPO L35)

CONDITION:

SOME VEHICLES IDENTIFIED ABOVE MAY ILLUMINATE THE MIL AND/OR STORE A DTC 32 (EGR ERROR) WITH NO NOTICEABLE DRIVEABILITY CONCERN (ROUGH IDLE AND/OR SURGE, ETC.). THIS MAY OCCUR WHILE CLIMBING A GRADE, TOWING A TRAILER OR DRIVING INTO A STRONG HEAD WIND.

OTHER VEHICLES MAY ILLUMINATE THE MIL AND/OR STORE A DTC 32 (EGR ERROR) AND EXHIBIT NOTICEABLE DRIVEABILITY CONCERNS (ROUGH IDLE AND/ OR SURGE, ETC.).

CAUSE:

DURING EGR OPERATION, THE EGR VALVE MAY NOT RESPOND TO THE COMMANDED SIGNAL IN THE TIME ALLOWED.

CORRECTION:

VEHICLES SETTING A DTC 32, WHICH WERE BUILT BEFORE THE VIN BREAKPOINT LISTED BELOW, SHOULD:

1. HAVE THE PROM ID CHECKED WITH A TECH 1.

2. VEHICLES IDENTIFIED AS HAVING PROM ID'S WITH THE OLD CALIBRATION SHOULD HAVE THE NEW MEMCAL LISTED BELOW INSTALLED.

3. VEHICLES WHICH ALREADY HAVE THE NEW SERVICE MEMCAL AND HAVE A STORED DTC 32 SHOULD CONTINUE TO BE SERVICED USING STRATEGY BASED DIAGNOSIS.

4. VEHICLES EXHIBITING DRIVEABILITY CONCERNS WITH THE NEW MEMCAL SHOULD CONTINUE TO BE DIAGNOSED WITH STRATEGY BASED DIAGNOSIS PROCEDURES.

NOTICE: THE NEW MEMCALS LISTED BELOW HAVE ALSO BEEN RELEASED FOR A CONDITION LISTED AS 'DRIVELINE GROWL IN 4TH GEAR AFTER TCC APPLIED.'

THE VIN BREAKPOINT HAS BEEN ESTABLISHED:

DIVISION PLANT VIN BREAKPOINT ________ _____ ______________ CHEVROLET BALTIMORE 1GBDM19W5SB255435 GMC BALTIMORE 1GKDM19W1SB559796

PARTS INFORMATION SERVICE MEMCALS ARE AVAILABLE FROM GMSPO AS OF SEPTEMBER 18, 1995.

OLD B/C NEW B/C VEHICLE EMISSIONS MEMCAL P/N MEMCAL P/N _______ _________ __________ __________ M VAN FED., CALIF. BPKX BSWW AND CANADA 16219009 16231839

L VAN FED., CALIF. BPKY BSWX AND CANADA 16219012 16231843

WARRANTY INFORMATION FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION LABOR TIME _______________ __________ J6364 0.3 HR.

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.