DRIVELINE GROWL NOISE AND OR VIBRATION (REPLACE MEMCAL). GMC Truck Safari

SUBJECT: DRIVELINE GROWL NOISE AND/OR VIBRATION (REPLACE MEMCAL)

MODELS: 1995 CHEVROLET AND GMC TRUCK M/L VAN WITH HYDRA-MATIC 4L60-E (RPO M30) AND 4.3L ENGINE (RPO L35)

VIN BREAKPOINTS PRIOR TO 255435 - CHEVROLET VIN BREAKPOINTS PRIOR TO 559796 - GMC TRUCK

CONDITION:

SOME OWNERS MAY EXPERIENCE A DRIVELINE GROWL NOISE AND/OR VIBRATION IN FOURTH GEAR AFTER THE TORQUE CONVERTER CLUTCH IS APPLIED.

CAUSE:

TORQUE CONVERTER CLUTCH APPLY SPEED IS TOO LOW.

CORRECTION:

CHECK THE PROM IDENTIFICATION TO BE SURE THAT THE VEHICLE HAS NOT BEEN UPDATED. REPLACE PROM WITH THE APPROPRIATE PART NUMBER LISTED BELOW. REFER TO YOUR SERVICE MANUAL FOR PROPER PROCEDURE.

IMPORTANT: PLEASE REFER TO BULLETIN 57-65-22 FOR INFORMATION REGARDING EGR DTC 32.

SERVICE PARTS INFORMATION

PREVIOUS NEW MEMCAL MEMCAL VEHICLE EMISSIONS PART #/CODE PART #/CODE

M-VAN *FED/CALIF./CAN. 16219009/BPKX 16231839/BSWW

L-VAN *FED/CALIF./CAN. 16219012/BPKY 16231843/BSWX

M-VAN #EXPORT/NM8 16212115/BNBF 16232456/BTAB

L-VAN #EXPORT/NM8 16212105/BNBD 16232453/BTAA

M-VAN @EXPORT/VD1/NA7 16219045/BPKZ 16231846/BSWY

L-VAN @EXPORT/VD1/NA7 16219055/BPLA 16231848/BSWZ

* GENERAL UNLEADED EXPORT # LEADED @ UNLEADED

PARTS ARE EXPECTED TO BE AVAILABLE ON SEPTEMBER 18, 1995 AT GMSPO.

WARRANTY INFORMATION

FOR VEHICLES REPAIRED UNDER WARRANTY, USE: LABOR OPERATION: J6364 LABOR TIME: 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.