GM Service Manual Online
For 1990-2009 cars only

NON-REPAIRABLE POLICE SPEEDOMETER,REPLACEMENTS

VEHICLES AFFECTED: 1984 Chevrolet 'A'

A special police speedometer is released to retain calibration over a wide range of temperatures. This speedometer and those of future model years will not be repairable.

These speedometers must be replaced as assemblies, rather than repaired by components.

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.