Alternator/generator/regulator problems of the 2002 Chevrolet Astro

I only drive this 2002 Chevrolet Astro van in our small town because I am terrified to drive it on expressways or in heavy traffic because the distributor cap collected moisture and the engine stopped in heavy traffic almost causing terrible accidents three times in the past 8 months. Last week I drove the van into town. I keep a close watch on all the gauges because of the previous problems. When I left the house all the gauges on the dash were working and the battery was between 12-14 volts. I noticed within 5 miles the battery volts were decreasing so I headed for home. By the time I reached home (10 miles all total), the volt meter was in the red zone, all the gauges (except for oil pressure) and speedometer were not working and, I believe, the headlights were out. I pulled the van into the drive and shut it off. I had difficulty opening the door (power locks) to get out. The van would not start again. The van is under warranty so I called courtesy Chevrolet who had the van towed in for service. They called me the following Monday to tell me they replaced the alternator, computer and battery and the van was ready but they had broken the radio and would replace it on Tuesday. I said fine and I would pick it up on Wednesday (February 9, 2005). Courtesy Chevrolet called me on Tuesday and told me not to come on Wednesday because the voltage problem was not corrected and they would call me when the van was ready. They called on February 10, 2005 to say the alternator was bad and had been replaced a second time.

The alternator was replaced several times.