2011 Peterbilt 386 antenna & cb ground

I drive a Peterbilt 386. Was going to install my better c.b. in the truck, so I checked the swr's. The factory antenna system blows. The swr's were a "3". You would think that if you spent $100,000 on a truck, that it would have at least a great antenna setup. These truck manufacturers are a joke! I decided to run my own coax, use my own mount, and my Wilson 2000. I have mounted the antenna on the back of the cab, and ran my ground to the frame. I will check monday, if the swr's came down (they were a 2.5 without the ground wire.

I am also thinking about running my power wires to the batteries. I believe that the factory posts inside the truck, does not have a sufficient enough ground. I am getting horn, light, wiper, and turnsignal feedback through my c.b. speaker. It has to be a pathetic ground, to have all the accessories feed-back.

Has anyone on here had the same problem with these trucks? If so, what did you do to get rid of the problem?

Thanks