GM Service Manual Online
For 1990-2009 cars only

REVISED VEHICLE SPEED SENSOR TEST SPECS.-SERVICE MANUAL

VEHICLES AFFECTED: 1985 Chevrolet and Monte Carlo Models Equipped with Gasoline Engines

Step 2 and Page 6E1-40 of the 1985 Passenger Shop Manual (ST-329-85) Loose Leaf and Bound manuals states, 'If voltage now reads above 20 volts..' The correct voltage specification is 10 volts. Please make a note of this change in your copies of the shop manual.

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.