When installing drivers' side door lock switch module, part no. 20610122 on subject styles built prior to February 1, 1985, the following procedure must be followed in order for the switch to operate properly.
1. Remove light blue wire from connector terminal C using a pick.
2. Remove black wire from connector from B.
3. Bend terminal lock tabs back to original position before replacing wires into connector.
4. Install light blue wire in connector terminal B.
5. Install black wire in connector terminal C.
6. Check operation of switch module for correct performance.
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.