SMU- SECTION 0B & 604 SPARK PLUG USAGE. Chevrolet Lumina 1992

SUBJECT: SERVICE MANUAL UPDATE - SECTIONS 0B AND 6D4 - REVISED SPARK PLUG USAGE AND GAP INFORMATION

MODELS: 1991-92 BUICK REGAL 1991 CHEVROLET LUMINA 1991 OLDSMOBILE CUTLASS SUPREME 1991 PONTIAC GRAND PRIX WITH 2.5L OR 3.1L ENGINE (VINS R, T - RPOS LR8, LH0)

THIS BULLETIN IS BEING ISSUED TO REVISE THE PUBLISHED SPARK PLUG USAGE AND GAP INFORMATION IN SECTIONS 0B (MAINTENANCE AND LUBRICATION) AND 6D4 (IGNITION SYSTEM) OF THE SERVICE MANUAL.

THE FOLLOWING TABLE CONTAINS THE CORRECT SPARK PLUG USAGES AND APPROPRIATE GAP.

ENGINE SPARK PLUG # GAP ====== ============ ===

2.5L (VIN R) R43TS6 1.50 MM (0.060") 3.1L (VIN T) R44LTSM 1.14 MM (0.045")

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.