VEHICLE SPEED SENSOR SEC. 8A MANUAL/REVISED PAGES

MODELS AFFECTED: 1988-1990 REGAL

SERVICE MANUAL UPDATE - SECTION 8A-33

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

1988 BUICK REGAL

Page 8A-33-2

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

Page 8A-33-3

Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 2)" Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 3)"

Insert the attached new test B, Page 8A33-2A.

1989 and 1990 BUICK REGAL

Page 8A-33-2

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

Page 8A-33-3

Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 3)" Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 4)"

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.