Hope someone can help me out. My son has a 2005 silverado with the V6. It is now on it's 4 distributor cap. Corrosion is the problem and I have checked with the dealership to see if there were any tech bulletins but they show none. We have tried factory and aftermarket caps and they only last about 6 months. I have contacted GM but they want the truck taken to the dealership for inspection. What are they going to check if it is running fine now? This problem starts to show up after setting for a couple of days and then it takes several tries to get it started and it will run fine for 1 day to several days. Hope someone knows what to do with this problem. Thanks, Rick