For 1990-2009 cars

# DIESEL OIL FILTER SPEC 3.8 PLUG:CORRECTION: OWNER MANUAL

THE FOLLOWING CORRECTIONS SHOULD BE MADE ON THE "MAINTENANCE AND LUBRICATION" CHART ON PAGE OB-4 OF THE 1981 FULL SIZE BUICK CHASSIS SERVICE MANUAL: 1.OIL FILTER FOR DIESEL ENGINE-CODE N-TYPE #PF45. 2.SPARK PLUG SIZE CORRECTION. SERIES A&E ENGINE CODE 3 SPARK PLUG TYPE R45TS GAP .040" SERIES A,B & C ENGINE CODE A SPARK PLUG TYPE R45TS8 GAP .080"

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.