POWER DOOR LOCKING SYSTEM (DIAGNOSIS AND REPAIR)

VEHICLES AFFECTED: 1988-90 C-H CAR

CONDITION:

Power Door Lock will not lock or unlock the latch, but manual operation is normal.

CAUSE:

Under certain build tolerance conditions the bellcrank assembly cannot move the inside locking rod far enough to trip the latch. (View A, Diagram I; View B, Diagram II)

DIAGNOSIS:

Verify that the system functions properly in the manual mode.

CORRECTION:

Remove the trim pad and verify that all rod attachments are secure and that all locking system components are properly installed. Operate the system manually and verify that there are no binds in the locking system.

Operate the power actuator and determine if teh bellcrank is moving the locking rod far enough to trip the latch in either the locking or unlocking direction. (Diagram I and II)

If system will not lock, install Clip part number #25527289 and Rivet part number #15646304 to front of slot opening in bellcrank. (See Diagram III)

If system will not unlock, install Clip part number #25527289 and Rivet part number #15646304 to rear of slot opening in bellcrank. (See Diagram IV)

REPAIR:

Install Clip part number #25527289 and Rivet part number 15646304 as illustrated in Diagram III (system will not lock) or Diagram IV (system will not unlock).

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.