WARRANTY ADMINISTRATION - EMISSION WARR. PARTS COVERAGE. Buick Roadmaster 1993

THIS BULLETIN IS BEING REVISED TO INFORM "GM OF CANADA" AND "NAES" DEALERS THAT THEY ARE NOT AUTHORIZED TO UTILIZE THIS SERVICE BULLETIN

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

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REVISION: 06/08/94

THIS BULLETIN IS BEING REVISED TO CHANGE MODELS TO "ALL PASSENGER CARS AND LIGHT DUTY TRUCKS" AND TO CHANGE THE CONTENT OF THE SECOND AND THIRD PARAGRAPH. ----------------------------------------------------------------------

SUBJECT: WARRANTY ADMINISTRATION -- EMISSION WARRANTY PARTS COVERAGE

MODELS: ALL PASSENGER CARS AND LIGHT DUTY TRUCKS

EMISSIONS WARRANTY APPLICATIONS

THE EMISSIONS SYSTEMS AND PARTS COVERED BY THE FEDERAL AND CALIFORNIA EMISSIONS WARRANTIES ARE PRINTED IN WARRANTY BOOKS AND THE GM SERVICE POLICIES AND PROCEDURES MANUAL. BECAUSE OF COMPLEXITY AND DIFFERENCES IN THE PARTS COVERED BY THE TWO EMISSIONS WARRANTIES, NOT ALL EMISSION WARRANTED PARTS HAVE BEEN PRINTED UNDER THE SYSTEMS HEADINGS IN THE OWNER WARRANTY BOOKS. THE COMPLETE EMISSIONS WARRANTED PARTS LISTING IS PUBLISHED IN ARTICLE 1.2 OF THE GM SERVICE POLICIES AND PROCEDURES MANUAL (SEE LIST).

ANYTIME THERE IS A QUESTION CONCERNING EMISSIONS WARRANTY APPLICATION, DEALER/RETAILER PERSONNEL ARE TO REFER TO THE EMISSIONS WARRANTED PART LIST IN THE GM SERVICE POLICIES & PROCEDURES MANUAL FOR THE MODEL YEAR OF THE VEHICLE INVOLVED. AFTER REVIEW OF THE GM SERVICE POLICIES AND PROCEDURES MANUAL, IF THERE IS STILL A QUESTION, CONTACT YOUR APPROPRIATE DIVISIONAL PERSONNEL FOR CLARIFICATION.

DIFFERENCES IN THE EMISSIONS WARRANTED PARTS UNDER FEDERAL AND CALIFORNIA EMISSIONS WARRANTIES HAVE BEEN ELIMINATED. FUTURE EDITIONS OF WARRANTY AND OWNER ASSISTANCE INFORMATION BOOKS WILL BE REVISED TO REFLECT THE COMPLETE EMISSIONS WARRANTED PARTS LIST.

EMISSIONS-WARRANTED PARTS LIST AS PUBLISHED IN THE 1994 SERVICE POLICIES AND PROCEDURES MANUAL FOR LIGHT-DUTY VEHICLES

(THIS LIST IS PROVIDED TO ASSIST SERVICE PERSONNEL WITH IDENTIFYING PARTS THAT SHOULD BE COVERED BY THE EMISSIONS WARRANTIES. IF THERE ARE EMISSIONS-RELATED PARTS THAT ARE NOT ON THIS LIST, PLEASE CONTACT YOUR DISTRICT MANAGER SERVICE FOR GUIDANCE OR REFER TO THE APPLICABLE SERVICE POLICY AND PROCEDURES MANUAL FOR THE MODEL YEAR VEHICLE INVOLVED.)

(*) DESIGNATES 7/70,000 COVERAGE ON VEHICLES EQUIPPED WITH THE CALIFORNIA EMISSIONS OPTION ONLY.

1 ENGINE CONTROL SYSTEM

BAROMETRIC PRESSURE SENSOR MASS AIR FLOW SENSOR (*) CAMSHAFT POSITION SENSOR ON-BOARD DIAGNOSTIC SYSTEM COOLANT FAN CONTROL RELAY OXYGEN SENSORS COOLANT LEVEL SENSOR PARK/NEUTRAL POSITION SWITCH CRANKSHAFT POSITION SENSOR POWERTRAIN CONTROL MODULE DATA LINK CONNECTOR PROGRAMMABLE READ ONLY MEMORY PROM ENGINE CONTROL MODULE (*) THERMAL VACCUM VALVES ENGINE COOLANT TEMP. SENSOR THROTTLE POSITION SENSOR FAST IDLE SOLENOID THROTTLE POSITION SWITCH FLEXIBLE FUEL SENSOR TORQUE CONVERTER CLUTCH SWITCH INTAKE AIR TEMPERATURE SENSOR TORQUE CONVERTER CLUTCH SOLENOID V MALFUNCTION INDICATOR LAMP TRANSMISSION SPEED SENSORS MANIFOLD ABSOLUTE PRESSURE SENSOR VACUUM SENSOR (*) MANIFOLD DIFFERENTIAL PRESSURE SEN VEHICLE CONTROL MODULE VEHICLE SPEED SENSOR

2 FUEL MANAGEMENT SYSTEM

ALTITUDE FUEL LIMITER (DIESELS) FUEL INJECTION NOZZLES CENTRAL PORT INJECTOR ASSEMBLY (*) FUEL INJECTORS DIESEL FUEL INJECTION PUMP FUEL PRESSURE REGULATOR DIESEL FUEL INJ. PUMP TIMING ADJ. FUEL RAIL (*) FLEXIBLE FUEL CONTROL MODULE GLOW PLUGS (DIESELS)

3 AIR MANAGEMENT SYSTEM

AIR CLEANER (*) IDLE SPEED CONTROL MOTOR AIR CLEANER DIAPHRAGM MOTOR INTAKE MANIFOLD (*) AIR CLEANER RESONATOR INTAKE MANIFOLD TUNING VALVE AIR CLEANER TEMP. COMPENSATOR VLV. INTAKE MANIFOLD TUNING VALVE RELAY AIR INTAKE DUCTS SUPERCHARGER (*) CHARGE AIR CONTROL COMPONENTS SUPERCHARGER BYPASS VALVE ACTUATOR CHARGE AIR CONTROL ACTUATOR SUPERCHARGER BYPASS VALVE CHARGE AIR CONTROL SOLENOID VLV. THERMAL VACUUM VALVE CHARGE AIR CONTROL VALVE THROTTLE BODY (*) CHARGE AIR COOLER THROTTLE BODY HEATER CHARGE AIR COOLER FAN THROTTLE CLOSING DASHPOT ENGINE AIR HEAT STOVE TURBOCHARGER (*) IDLE AIR CONTROL MOTOR TURBOCHARGER OIL SEPARATOR IDLE AIR CONTROL VALVE TURBOCHARGER THERMO PURGE SWITCH

4 IGNITION SYSTEM

DISTRIBUTOR (*) IGNITION TIMING ADJUSTMENT DISTRIBUTOR CAP KNOCK SENSOR SYSTEM DISTRIBUTOR IGNITION CNTRL MODULE KNOCK SENSOR SYSTEM OVERRIDE SW. DISTRIBUTOR PICK UP COIL KNOCK SENSORS DISTRIBUTOR ROTOR SPARK PLUG WIRES IGNITION COIL SPARK PLUG (ONLY UP TO FIRST IGNITION CONTROL MODULE (*) SPECIFIED REPLACEMENT INTERVAL)

5 CATALYTIC CONVERTER SYSTEM

CATALYTIC CONVERTERS (*) EXHAUST PIPES BETWEEN CONVERTERS EXHAUST MANIFOLD (*) BETWEEN CONVERTERS AND EXHAUST MANIFOLD

6 POSITIVE CRANKCASE VENTILATION SYSTEM

CRANKCASE DEPRESSION REGULATOR VLV (DIESELS) OIL FILLER CAP PCV OIL SEPARATOR PCV FILTER PCV VALVE

7 EXHAUST GAS RECIRCULATION SYS

EGR CONTROL VALVES EGR VALVE & EXHAUST PRESS. REG. EGR PASSAGES SOLENOID VALVE (DIESELS) EGR TEMPERATURE SENSOR EGR VALVE RELAY EGR THERMAL VACUUM VALVE EXHAUST BACKPRESSURE TRANSDUCER EGR VALVE EXHAUST PRESSURE REGULATOR VALVE AND ACTUATOR (DIESELS)

8 SECONDARY AIR INJECTION SYSTEM

BYPASS VALVE DECELERATION VALVE CATALYTIC CONVERTER SECONDARY AIR PUMP (*) INJECTION CHECK VALVE PUMP BELT CATALYTIC CONV. AIR SUCTION VALVE SWITCHING VALVES (PRIZM) VACUUM DELAY VALVE CHECK VALVES

9 EVAPORATOR EMISSION CONTROL SYS (GASOLINE ENGINES)

CANISTER FUEL FILLER CAP CANISTER CONTROL VALVE FUEL TANK FLR PIPE WITH RESTRICTOR CANISTER PURGE SOLENOID VALVE FUEL TANK PRESSURE CONTROL VALVE CANISTER PURGE THERMAL VACUUM VLV FUEL TANKS (*) FUEL FEED AND RETURN PIPES & HOSES

10 MISCELLANEOUS ITEMS USED IN ABOVE SYSTEMS

ACTUATORS PIPES BELTS PULLEYS CLAMPS RELAYS CONNECTORS SEALING DEVICES DUCTS SENSORS FITTINGS SPRINGS GASKETS SWITCHES GROMMETS TUBES HOSES VALVES HOUSINGS WIRING MOUNTING HARDWARE

FIGURES: 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.