ELECTRONIC CONTROL MODULE (ECM) EXCHANGE PROGRAM

MODELS: ALL EQUIPPED WITH ECM

THIS BULLETIN CANCELS AND SUPERSEDES 81-I-35 (JULY, 1981) ALL COPIES OF WHICH SHOULD BE DESTROYED.

To ensure that replacement ECM units are returned as soon as possible, effective immediately, ECM units are excluded from the normal 30 day parts retention policy as presented in Section 1. Part 1-B, of the current GMC Service Policies and Procedures Manual. ECM's are to be returned to WDDCM Parts Distribution Centers weekly in accordance with Section IV, Item G9 of the current GM Parts Dealer Parts and Accessories Policies and Procedures Manual.

Elimination of the 30 day retention period for ECM units will speed analysis and resolution of any reported malfunctions. It will also result in earlier receipt of credit for ECM cores.

In the near future, ECM's will be received with a two (2) copy return tag. The hard copy is to be attached to the ECM in the same manner that is presently being used. The soft copy of the tag is to be attached to the scrap copy of the dealership repair order and retained for the Dealer Service Consultant/Area Service Manager. The returned ECM will not be processed by WDDGM if the tag does not include all information. Failure to provide all pertinent information will delay processing of the part core credit to the dealership. This revised tag incorporates improvements to reduce the time required for completion and includes more meaningful information concerning the reason for replacement. Whenever an ECM is sold "over the counter" by parts department, completion of the tag is still required; however, the area requesting the repair order number should list the letters "OTC" indicating this type of sale.

Please make sure all affected personnel review this Bulletin so all replaced ECM units are promptly returned.

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.