MANUAL UPDATE SECTIONS OB & 6D SPARK PLUG TYPE AND GAP

Model and Year: 1989 GEO METRO

TO: ALL CHEVROLET DEALERS

The purpose of this bulletin is to correct the spark plug information shown in the 1989 GEO Metro Service Manual.

The spark plug type shown on page OB-7 is incorrect. The correct spark plug type is: A/ C (R42XLS); NGK (BPR6ES-11) and ND (W20EPR-U11).

The spark plug gap is not shown in Section 6D4 of the Service Manual or on the Emission Label, to correct this oversite the correct spark plug gap is listed below:

Spark Plug Gap is: 0.039 - 0.043in. (1.0 - 1.1mm)

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.