WARRANTY ADMINISTRATION INCORRECT USE OF LABOR OP.. Chevrolet Astro

REVISION: 01/26/96

THIS BULLETIN IS BEING REVISED TO REMOVE ONE LABOR OPERATION NUMBER AND DESCRIPTION, AND TO CORRECT ONE LABOR OPERATION NUMBER. ----------------------------------------------------------------------

SUBJECT: WARRANTY ADMINISTRATION--INCORRECT USE OF LABOR OPERATIONS

MODELS: 1996 CHEVROLET AND GMC C/K, S/T, M/L TRUCKS WITH 4.3L, 5.0L, 5.7L, 7.4L ENGINES (VINS W, X, M, R, J - RPOS L35, LF6, L30, L31, L29)

"GM OF CANADA" AND "NAES" DEALERS ARE NOT AUTHORIZED TO UTILIZE THIS SERVICE BULLETIN.

THE FOLLOWING LABOR OPERATIONS DO NOT APPLY TO 1996 MODEL YEAR TRUCKS WITH THE ABOVE ENGINE RPOS.

IMPORTANT: SERVICING OF THE DISTRIBUTOR IS NOT ALLOWED ON THE 1995-96 ENGINES LISTED. PARTS ARE NOT AVAILABLE TO BE ORDERED THROUGH GM SERVICE PARTS OPERATIONS; TO DO REPAIRS ON THE DISTRIBUTOR ONLY A COMPLETE DISTRIBUTOR ASSEMBLY CAN BE REPLACED.

DISTRIBUTOR

THE FOLLOWING LABOR OPERATIONS DO NOT APPLY AT THIS TIME FOR DISTRIBUTOR REPAIRS.

J-4360 CAP, IGNITION DISTRIBUTOR -- REPLACE J-4380 ROTOR, DISTRIBUTOR -- REPLACE J-4440 MODULE DISTRIBUTOR -- REPLACE J-4460 PICK-UP COIL OR POLE PIECE -- REPLACE J-4480 MAINSHAFT DISTRIBUTOR -- REPLACE J-4520 DISTRIBUTOR ASSEMBLY -- R&R

THE FOLLOWING LABOR OPERATIONS SHOULD BE THE ONLY ONES USED FOR THE 1996 MODEL YEAR ON LISTED ENGINE RPOS FOR DISTRIBUTOR ASSEMBLY. **J-4530 DISTRIBUTOR ASSEMBLY--REPLACE**, CAM RETARD OFFSET ADJUST V8 ONLY-J-4544**

IMPORTANT: WHEN SERVICING THE FUEL INJECTION SYSTEM ON 1996 TRUCK ENGINES, ONLY ONE LABOR OPERATION IS TO BE USED.

FUEL SYSTEM

THE FOLLOWING LABOR OPERATIONS DO NOT APPLY FOR FUEL INJECTION REPLACE.

J-5547 CENTRAL PORT INJECTION -- REPLACE J-5650 MPFI -- MULTI-PORT FUEL INJECTOR -- REPLACE

THE FOLLOWING LABOR OPERATION SHOULD BE THE ONLY ONE USED FOR THE 1996 MODEL YEAR ON LISTED ENGINE RPOS FOR FUEL INJECTOR REPLACED. **J-5550 CENTRAL SEQUENTIAL PORT FUEL INJECTOR -- REPLACE**

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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.