SERVICE MANUAL UPDATE-SEC.6A1 CAMSHAFT PULLEY TIMING MARK

Subject: CAMSHAFT PULLEY TIMING MARK ALIGNMENT

Model and Year: 1990 GEO STORM

TO: ALL CHEVROLET DEALERS

This bulletin revises the camshaft and tension pulley procedure on page 6Al-l2 of the 1990 GEO Storm Service Manual (ST371-90). Rotate the crankshaft to position the number 4 cylinder at TDC on the compression stroke; align the camshaft pulley timing mark to the 9 o'clock position (Figure 15).

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.