[Storm Chaser]

Glad to meet another amateur and thanks for your help. The noise is definately coming from the brake booster. The choke seemed to help some but did not eliminate it completely. It is tolerable at this point and will not happen during open driving when I am likely to use the radio. I am wondering if a top loaded antenna would eliminate it completely. Right now I have a side mount firestik mounted to the front ds just above the GM emblem and have to remaining coax coiled into a balum inside the fender well. I also wired a redundant ground from the mount to the chassis and have a good solid electrical ground. In the near term I will be installing a dual band 2m/70cm radio and gps navigation and wondering if the interference will affect those units as well.