INTERMITTENT ECM CONNECTION MAY BE WEAK TERMINAL GRIP

SUBJECT: INTERMITTENT CONNECTION TO THE ECM (INSPECT TERMINAL, WEAK GRIP REPLACE)

VEHICLES AFFECTED: A/B/C/D/E/F/G/H/J/K/L/N/P/V/W/X/Y/Z AND ALL TRUCKS

Condition: A condition may exist in which the female terminals in the connector to the ECM do not make a solid connection to the male pins in the ECM (see illustration). This can result in an intermittent condition, in any circuit operated by the ECM. The Service Manuals direct a check of connections any time an intermittent condition is found, and this may be the cause of some of these conditions.

Correction: Visually inspect the terminal using a flashlight, or use a .95mm pin gauge. The gauge should not pass freely through the female terminal. Do not probe the terminal with anything other than the pin gauge, as probing could damage the terminal. If the female terminal does not grip properly, replace the terminal with P/N 12020757. General directions on wiring repair are shown in Section 8A of the Service Manual.

Use existing Labor Operations:

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.