2001-2003 Chevrolet Silverado Ignition Distributor System Corrosion Inspect/Replace

General Motors has decided to conduct a Voluntary Emission Recall involving certain 2001-03 Chevrolet Silverado and GMC Sierra model vehicles, equipped with a 4.3L V6 (RPO L35 - VIN W or RPO LU3 - VIN X) engine. The ignition distributor cap and rotor in these vehicles may corrode and cause ignition system failure. This condition may result in rough engine idle, misfire, stalls, engine cranks but does not run and/or illumination of the Malfunction Indicator Lamp (MIL).
Correction
Dealers are to inspect the distributor ignition ventilation holes and, if necessary, replace the distributor cap and rotor, remove the External Ignition Protection (EIP) vent screens and install a foam sleeve around the A/C accumulator line.
Service Procedure
1. Raise the engine hood and inspect the ignition distributor ventilation holes, located in the base of the distributor, to see if the External Ignition Protection (EIP) screens are present.
2. If the EIP vent screens are present: • Remove the vent EIP screens using the procedure listed in Step
3. • Refer to the appropriate procedure in the Engine Controls sub-section of the applicable Service Manual and replace the distributor cap and rotor.
3. Remove the vent screens (1), located in the base of the distributor, by inserting a plastic-handled, long blade awl or pick (2) into each of the two airflow vent holes and popping out the screen. If there are no EIP vent screens in the airflow vent holes, check the vent holes for debris.

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