GM-GMC: Moisture in the Distributor, ventilation holes, engine cranks

Question
I have a GMC K1500 that doesn't like the rain. Which makes living in the NW a little difficult. I have to remove the distributor cap, place a hair dryer close as I can, re-install and I'm on the road again. Or go out every 8 hours and start the engine and let idle for awhile. Both options are a pain. The cap and rotor have been replaced twice in the last 2 years. Finally, I got tired of it and pulled the distributor out thinking the base plate must be cracked. I was surprised to find two small manufactured slits in the bottom of the plate. I suppose to vent when the rotor is spinning. Is this the source of my moisture problem? What will happen if I plug the slits?. Or should I try to find a 12V hair dryer??? Thanks, Hal

Answer
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.

You didn't include the year of vehicle or engine etc etc.  This is the best I can come up with.
Hope this helps