For 1990-2009 cars

# SPARK PLUG APPLICATION PLUG TYPE AND GAP

#### Models Affected: All 1984 Models

The emission label on some Buicks may not have the spark plug gap information included. Spark plug information for 1984 Buicks is listed below: AC PLUG ELECTRODE ENGINE VIN TYPE GAP ------ --- ---- --- 1.8 O R44XLS .035 2.0 P R42CTS .035 2.5 R R43TSX .060 2.8 X R43CTS .045 3.0 E R44TSX .060 3.8 A R45TSX .060 3.8 3 R44TS8 .080 4.1 4 R45TSX .060 5.0 Y (Summer) R46SX .080 5.0 Y (Winter) R46SZ .060 (Production Only) 3.8 Turbo 9 R44TS .045 2.8 Z (H.O.) R42CTS .045 1.8 Turbo J R44XLS .035

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.