DRIVELINE VIBRATION OVER 37 MPH (NEW PCM CAL). Buick Regal 1996

THIS IS A MONTHLY SERVICE NEWSLETTER ARTICLE. THIS IS NOT INTENDED TO BE A PUBLISHED BULLETIN.

SUBJECT: DRIVELINE VIBRATION OVER 37 MPH (NEW PCM CALIBRATION)

MODELS: 1996 BUICK PARK AVENUE/ULTRA 1996 BUICK LESABRE 1996 BUICK RIVIERA 1996 BUICK REGAL WITH 3.8L ENGINE (VIN K - RPO L36)

CONDITION:

THERE HAVE BEEN REPORTS OF CHUGGLE, FISH BITE, SURGE AFTER THE TORQUE CONVERTER CLUTCH IS LOCKED AND SLIGHT ACCELERATION IS ATTEMPTED. THIS CONDITION MAY BE ATTRIBUTED TO MANY DIFFERENT CAUSES AND A THOROUGH DIAGNOSIS OF DRIVEABILITY AND TRANSMISSION SLIP CONDITIONS MUST BE INVESTIGATED AND CORRECTED PRIOR TO INSTALLATION OF A NEW CALIBRATION WHICH RAISES THE ENGAGEMENT SPEEDS OF THE TCC. SUCH THINGS AS POOR SECONDARY IGNITION MISFIRES, LEAN OR RICH INJECTORS, ETC. WILL NOT BE CORRECTED BY THE INSTALLATION OF ANY OF THESE NEW CALIBRATIONS. PLEASE INFORM THE OWNER THAT THERE WILL BE A LOSS OF FUEL ECONOMY AS A RESULT OF INSTALLATION OF THIS CALIBRATION. THE LOSS HAS BEEN FOUND TO BE IN THE AREA OF 1.0 TO 1.5 MILES PER GALLON, DEPENDING ON DRIVING HABITS AND CONDITIONS.

CORRECTION:

AS PER ABOVE, CORRECT ANY DRIVEABILITY AND TRANS SLIP CONDITIONS PRIOR TO INSTALLATION OF THESE CALIBRATIONS. THESE CALIBRATIONS ARE AVAILABLE AFTER CD 23 UPDATE TO YOUR TECHLINE EQUIPMENT. FOR THE TIME BEING IT MAY BE NECESSARY TO CALL THE SERVICE TECHNOLOGY GROUP HELP-LINE AT 1-800-828-6860 FOR A VEHICLE CONFIGURATION NUMBER (VCI) IN ORDER TO INSTALL THIS CALIBRATION.

FOLLOWING ARE THE CALIBRATIONS WHICH ARE CURRENTLY AVAILABLE FOR 1996 L36 ENGINES ONLY.

CALLBRATION NUMBER MODEL AXLE RATIO TIRES EMISSION 16258014 HB 2.84 P215 NATIONWIDE 16257924 HB 3.06 P215 NATIONWIDE 09354254 CB 2.84 P215 NATIONWIDE 16258084 CB 3.06 P215 NATIONWIDE 16258024 GB 3.06 P225 NATIONWIDE 16258044 WB 3.06 NATIONWIDE

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE: LABOR OPERATION J6355 AND CURRENTLY PUBLISHED LABOR TIMES.

FIGURES: 00 ATTACHMENTS: 00

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.