I have a 2002 Chevy Trailblazer and the last 8 months or so I have a problem that I cannot get figured out. I start the car right up in the morning and it seems like on damp or rainy days I will drive a mile or so but then it seems to lose some power and I come to a stop light and the RPM's go all the way down and it stalls out on me. I start the car right up and it runs great the rest of the day. I never get a code, another thing is if I press the driver side power window switch the RPM's jump up or down. Any help I would appreciate.
Ron