INFORMATION ON ENGINE EXCHANGE PROGRAM. Buick Coachbuilder 1994

********************************************************************** TO GAIN NEEDED PRODUCT FEEDBACK ON THE 4.3L V8 (L99 VIN CODE W) AND 5.7L V8 (LT1 VIN CODE P) ENGINES, AN EXCHANGE PROGRAM IS NOW IN EFFECT AND WILL CONTINUE FOR THE 1994 MODEL YEAR. ********************************************************************** THE EXCHANGE PROGRAM WILL BE ADMINISTERED BY EACH DIVISIONS' TECHNICAL ASSISTANCE NETWORK (TAN).

THIS INFORMATION SHOULD BE FILED IN THE "SPECIAL EXCHANGE POLICY PROCEDURES" MANUAL PREVIOUSLY PROVIDED.

IF YOUR DEALERSHIP RECEIVES A CUSTOMER CONCERN ON EITHER OF THESE ENGINES, FOLLOW THE PROCEDURE BELOW.

A. DIAGNOSIS IF ANY INTERNAL ENGINE COMPONENTS REQUIRE REPLACEMENT, THE ENGINE MUST BE EXCHANGED. ONLY THE VALVE ROCKER COVERS AND THE OIL PAN MAY BE REMOVED TO DETERMINE WHETHER THE ENGINE MUST BE REPLACED. IF A REPLACEMENT ENGINE IS NEEDED, ANY OF THE ABOVE MENTIONED PARTS REMOVED MUST BE REINSTALLED PRIOR TO RETURNING FOR EVALUATION (I.E., COMPLETE ENGINES ARE REQUIRED FOR EXCHANGE).

B. EXCHANGE PROCEDURE ONCE THE ABOVE DIAGNOSIS IS MADE AND AN EXCHANGE ENGINE IS DEEMED NECESSARY, CALL THE APPROPRIATE TECHNICAL ASSISTANCE NETWORK (TAN).

- TAN WILL REQUIRE THE VIN AND ENGINE SERIAL NUMBER ALONG WITH A DETAILED DESCRIPTION OF THE CUSTOMER CONCERN AND YOUR DIAGNOSIS. THE ENGINE NUMBER IS AN ALPHA NUMERIC COMBINATION STAMPED ON A PAD ON THE ENGINE BLOCK IN FRONT OF THE R.H. CYLINDER HEAD.

- TAN WILL ARRANGE TO SHIP A REPLACEMENT ENGINE WITHIN 48 HOURS AND PROVIDE YOU WITH A TAN REFERENCE NUMBER.

- THE REPLACEMENT ENGINE WILL BE COMPLETE EXCEPT FOR ACCESSORIES (I.E., STARTER, GENERATOR, ETC.).

- THE REPLACEMENT ENGINE WILL BE SHIPPED WITH MINIMUM OIL QUANTITY; ADD OIL PER SPECIFICATIONS.

- THE REPLACEMENT ENGINE WILL ALSO INCLUDE AN ENVELOPE WITH THE FOLLOWING: - RETURN SHIPPING LABEL - IDENTIFICATION CARD - BILL OF LADING

C. PREPARATION FOR SHIPPING THE REMOVED ENGINE MUST BE RETURNED IN THE CONTAINER PROVIDED, WITHOUT EXAMINATION OTHER THAN AS DESCRIBED IN SECTION A, ABOVE. ENGINE DRESS MUST REMAIN THE SAME AS THE REPLACEMENT ENGINE (I.E., MANIFOLDS, ETC.). DEALERSHIPS RETURNING UNITS EVEN PARTIALLY DISASSEMBLED WILL BE JUDGED AS VIOLATING THIS PROCEDURE AND AS SUCH WILL BE SUBJECTED TO BEING BILLED FOR AN ENTIRE ENGINE ASSEMBLY.

VISUALLY CHECK ALL FLUID LEVELS TO ASSURE THEY ARE WITHIN THE NORMAL OPERATING RANGE. IF NOT, DRAIN AND MEASURE THE OIL AND COOLANT DRAINED FROM THE CONCERNED UNIT. RECORD THE AMOUNT OF OIL AND COOLANT MEASURED ON THE REPAIR ORDER. REPLACE THE DRAIN PLUG.

REMOVE THE ENGINE ASSEMBLY AS OUTLINED IN THE 1994 MODEL YEAR SERVICE MANUALS.

IF THE REMOVED ENGINE LEAKS, MARK LEAK AREA ON ENGINE.

- WRITE THE TAN REFERENCE NUMBER ON THE REPAIR ORDER AND ON THE IDENTIFICATION CARD PROVIDED.

- FULLY COMPLETE THE IDENTIFICATION CARD.

- PLACE A COPY OF THE REPAIR ORDER AND THE COMPLETED IDENTIFICATION CARD IN THE ORIGINAL ENVELOPE AND ATTACH IT TO THE REMOVED ENGINE.

- PLACE THE REMOVED ENGINE INTO THE ORIGINAL SHIPPING CONTAINER.

D. SHIPPING INSTRUCTIONS - PLACE THE RETURN SHIPPING LABEL PROVIDED OVER THE ORIGINAL CONTAINER SHIPPING LABEL.

- THE BILL OF LADING PROVIDED IS THE ONLY DOCUMENT REQUIRED TO RETURN SHIP THE REMOVED ENGINE.

NOTE: THE SAME CARRIER, WHOSE NAME IS INDICATED ON THE BILL OF LADING, SHOULD BE USED FOR THE RETURN SHIPMENT.

- ALL REQUIRED DATA ON THE BILL OF LADING WILL BE COMPLETE, EXCEPT FOR THE DATE AND CARRIER SIGNATURE. AFTER THE BILL OF LADING HAS BEEN DATED AND SIGNED BY THE CARRIER, RETAIN THE LAST COPY WITH YOUR REPAIR ORDER AND PROVIDE THE OTHER TWO COPIES TO THE CARRIER. YOUR COPY OF THE BILL OF LADING, SIGNED BY THE CARRIER, IS YOUR PROOF OF THE ENGINE RETURN.

- THE REMOVED ENGINE IS TO BE SHIPPED BY TRUCK FREIGHT COLLECT TO:

GM POWERTRAIN FLINT ENGINE PLANT G3248 VAN SLYKE ROAD FLINT, MICHIGAN 48552 ATTN: 4.3L (L99) + 5.7L (LT1) ENGINE EXCHANGE PROGRAM QUALITY ASSURANCE DEPARTMENT

TO INCREASE THE EFFECTIVENESS OF THE PROGRAM, THE REMOVED UNIT SHOULD BE RETURNED IMMEDIATELY AFTER REMOVAL. FAILURE TO RETURN THE REMOVED UNIT WITHIN 10 DAYS WILL RESULT IN THE DEALERSHIP BEING BILLED AS FOLLOWS FOR THE UNIT FURNISHED, PLUS AN ADMINISTRATION CHARGE.

ENGINE ASSEMBLY CAR SERIES AMOUNT --------------- ---------- ------ L99 B BODY $3,712.50

LT1 B/D BODY 3,637.50 F/Y BODY 3,712.50

E. WARRANTY CLAIMS PROCESSING PROCEDURE UPON COMPLETION OF THE REPAIR, SUBMIT A WARRANTY CLAIM AS FOLLOWS:

LABOR * ** SERIES OP. LABOR OTHER ENGINE - PART CAR NUMBER DESCRIPTION HOURS HOURS ALLOWANCE ------ ------ ----------- ----- ----- ------------- B BODY J1880 REPL.ENGINE ASSY 7.5 0.2 L99 - $729.00 ADD - W/HEAVY 0.5 LT1 - $743.00 DUTY COOLING

D BODY J1880 REPL.ENGINE ASSY 7.8 0.2 LT1 - $743.00 ADD - W/HEAVY 0.5 DUTY COOLING

F BODY J1880 REPL.ENGINE ASSY 8.8 0.2 LT1 - $717.60 ADD - W/MANUAL 0.2 TRANS. ADD - W/A/C 1.2 ADD - W/ENGINE 0.3 OIL COOLER ADD - W/LOCKING 0.1 WHEEL COVERS/ NUTS (ONE/ALL)

Y BODY J1880 REPL.ENGINE ASSY 7.2 0.2 LT1 - $722.20 ADD - W/FOLDING 0.6 TOP

* ADMINISTRATION ALLOWANCE ** THE AMOUNT IDENTIFIED IN THE "PART ALLOWANCE" COLUMN ABOVE REPRESENTS 40 PERCENT OF DEALER NET PRICE OF THE DIFFERENCE BETWEEN THE CURRENT GMSPO DEALER NET PRICE LESS THE ENGINE RETURN CREDIT (CORE ALLOWANCE) FOR PARTS FURNISHED. THIS IS TO BE PLACED IN THE NET AMOUNT COLUMN OF THE CLAIM.

NOTE: APPLICABLE MISCELLANEOUS ITEMS, SUCH AS ENGINE OIL AND ENGINE COOLANT, SHOULD BE ADDED TO THE ABOVE PART ALLOWANCE AMOUNT AND INCLUDED IN THE NET AMOUNT (DNM) COLUMN OF THE CLAIM.

YOUR COOPERATION IS GREATLY APPRECIATED. PROMPT RETURN OF THE REMOVED ENGINE WILL INCREASE PROGRAM EFFECTIVENESS. IF YOU HAVE ANY QUESTIONS CONCERNING THE EXCHANGE PROGRAM ADMINISTRATION PROCEDURES, PLEASE CONTACT THE TECHNICAL ASSISTANCE NETWORK (TAN).

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.