VEHICLE SPEED SENSOR SEC. 8A MANUAL/REVISED PAGES

Models Affected: 1988-90 GRAND PRIX

SERVICE MANUAL UPDATE - SECTION 8A-33

The diagnostic test information in the 1988, 1989 and 1990 Grand Prix Service Manuals Section 8A-33 has been revised. Please make the following corrections in your copies of the following Service Manuals.

1988, 1989 and 1990 PONTIAC GRAND PRIX

Page 8A-33-2

Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 1)"and Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 2):

Page 8A-33-3

Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 3)" Insert the attached new test B, Page 8A-33-2A.

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.