UPDATED DIAGNOSTIC CHARTS 1982-83 EFI REVISIONS

Attached are nine (9) 1982-1983 updated EFI diagnostic charts. The affected charts are as follows:

1982-1983 Chart -'Diagnostic Circuit Check' 1982-1983 Chart -'Field Service Mode Check' 1982-1983 Chart 4 1983 Chart 4A 1983 Chart 8 1983 Chart 11 1982 Chart 11 1983.5 Chart 11B (One-Board ECM) 1982-1983 Chart - 'Code 24'

The revised 1983 charts should be inserted into your General Carline Information Manual until permanent page revisions are printed. The 1982 chart revisions should be taped over the existing charts in your 1982 Service Manuals.

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.