Alrighty, so I was a little wrong, and a little right when I said it
fixed my problem.

The electric blower motors, windshield wiper motor, etc, noise has gone
away. I just discovered that a power line right next to my house
overbears all the other noise that I now discovered my car is putting
out. My cars still putting out RF noise, I'm presuming from the spark
plugs and the fuel pump. Any suggestions beyond the capacitor trick? My
noise level drops to S0 or S1 when everything in my truck is off, and
when i'm away from the powerlines (unfortunately, my car can only go
about 30 feet from the powerline, which isn't far enough away to have
an effect).

Any suggestions for helping reduce the powerline noise? (This is large
main powerline that is going into my noise, not powerline for my car).

I tried putting my whip antenna onto a stud mount on a cable, and
touched the ground to my doorhinge, about the same noise level,
although I don't have a long enough cable to get this to my bumper or
anywhere else far away..

I went through a couple different radios today. I tried a Uniden Pro
510 (I think) with an ANL. The ANL was useless on my vehicle, didn't
help reduce the noise at all. I then purchased a Cobrta 75 WX (It's the
radio in the microphone with a small wired in base) with 'Soundcatcher'
or whatever, which I presume is a Noiseblocker, and not a ANL. This
doesn't do much at all to reduce the noise either. I'm still getting
about a steady S5 noise with my car on, or from the powerlines. With
everything off, I can clearly understand an S3 signal.