My climate control blower switch keeps failing

1. The blower switch keeps burning out. Any ideas as to why? It has the sliding type and it's always the far right blade, as you sit in the driver's seat, that has the wire burning off.
2. The old girl is getting some age on her and the weather stripping is going. I have found the kits, but they do not seem to include what I call the rain gutter. On the S10, it is a piece on plastic that runs up the "A" pillar and along the side of the cab. I don't know what the correct name for it is, per Chevrolet, and can't find a source for it. Can any one point me in the right direction?
Thanks,
Tom