HIGHER THAN NORMAL HYDROCARBONS. Buick Coachbuilder 1992

SUBJECT: HIGHER THAN NORMAL HYDROCARBONS DURING THE INSPECTION AND MAINTENANCE TEST AND/OR SLIGHT DETONATION NOISE (INSTALL NEW E-PROM)

MODELS: 1992-93 BUICK ROADMASTER 1992-93 CHEVROLET CAPRICE 1992 OLDSMOBILE CUSTOM CRUISER WITH 5.7L ENGINE (VIN 7 - RPO L05) AND 4L60 AUTOMATIC TRANSMISSION

CONDITION:

SOME OWNERS OF POLICE AND NON-POLICE VEHICLES MAY EXPERIENCE HIGHER THAN NORMAL HYDROCARBON EMISSIONS DURING THE IDLE PORTION OF THE INSPECTION AND MAINTENANCE TEST. ALSO, SOME POLICE VEHICLES MAY EXHIBIT A SLIGHT DETONATION DURING A LIGHT THROTTLE ACCELERATION.

CORRECTION:

IF ALL ENGINE MECHANICAL AND ELECTRICAL COMPONENTS ARE WORKING PROPERLY, INSTALL THE PROPER E-PROM LISTED FROM THE TABLE BELOW.

WARRANTY INFORMATION FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION: J6364 LABOR TIME: USE PUBLISHED LABOR OPERATION TIME.

PARTS INFORMATION

NEW NEW OLD OLD NEW EMISSIONS POLICE E-PROM B/C B/C SCAN SCAN FED./CAL. AXLE OPTION MODEL NUMBER CODE CODE ID ID NATIONWIDE RATIO Y / N YEAR ______ ____ ____ ____ ____ _________ _____ ______ _____

16220790 BPSJ AYDN 4621 0791 FEDERAL 3.42 Y VZ3 1992/1993 16220793 BPSK AYDP 4631 0801 FEDERAL 3.42 Y VZ2 1992/1993 16220835 BPSR BHHP 5131 0841 FEDERAL ALL N 1993

16220837 BPSS BATK 5911 0851 NATIONWIDE 3.23 N 1A2 1992 16220837 BPSS AZTF 1221 0851 NATIONWIDE 3.23 N 1A2 1992 16220837 BPSS BATK 5911 0851 FEDERAL 3.23 N 1A2 1993

16220839 BPST AYKC 5321 0861 NATIONWIDE ALL N 1992 16220839 BPST AYKC 5321 0861 FEDERAL ALL N 1993 16220839 BPST AXHX 0681 0861 NATIONWIDE ALL N 1992 16220839 BPST AXHX 0681 0861 FEDERAL ALL N 1993 16220839 BPST AXHY 0691 0861 NATIONWIDE ALL N 1992 16220839 BPST AXHY 0691 0861 FEDERAL ALL N 1993 16220839 BPST BATJ 5901 0861 NATIONWIDE ALL N 1992 16220839 BPST BATJ 5901 0861 FEDERAL ALL N 1993

16220795 BPSL BHHR 5141 0811 CALIFORNIA 2.56/ N 1993 2.73 16220795 BPSL BBBX 7861 0811 CALIFORNIA 2.56/ N 1993 2.73

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

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.