Radio static, Slightly OT-its my Chevy truck Options

[retrofit]

I Know there are some audio wizards at this site and could use some help.
The 914 I have no problems with. It's my '95 Chev PU. Have too much static on AM stations. Noise is also rpm related. Like alternator whine. FM is fine. Radio /CD is a Pioneer.
Local car audio shops really don't want to work on the problem.
Called Pioneer tech support and they suggested checking the ground.
Looks like I have to fend for myself
Going to pull out the radiio/cd and one at a time:
1. Check ground. Move ground to something like chassis or stiffening bars in dash
2. Run new power lead from battery to radio with fuse near radio. Try to get clean power.
3. Have alternator bench tested? Diodes?
4. Check antenna lead from radio to antenna.
5. Check for corrosion where antenna attaches to body.
Anything else?
Do noise filters work? May try one as last resort.
Ironic that my '74 with an old radio gets clean and clear signals while '95 PU with newer state of the art radio is giving me a headache! (IMG:style_emoticons/default/headbang.gif)