I have a problem with a gremlin under my hood, I have 2003 RT 200 pop with 5.7L engine,Chevrolet 3500 chasis. In the short version battery warning light comes on alternator shows no charge, replace alternator, same problem, replace battery same problem. The problem is intermittant and can last days or for 1 mile, and seems to go away when taking it to garage is mentioned. Has anyone else ever experianced this? HELP.