The window antenna car is a GM product? Your screen name and no call doesn't give any hint if you are in USA or elsewhere.
I do not know if other manufacturers use window antennas.
GM cars had a lot of engineering in the design of the radio, even the AM side. A front end and RF amp. And AM/FM pre-amp for the window antenna. I had a '97 Buick and the REAR window had built-in antenna and AM/FM pre-amp in the headliner. Perfect silence from electronic noises, and even played AM under bridges. Small fade-out, sometimes
REAR window antenna moves the antenna further from the engine and on-board computers. Only hope might be to drill
a hole in the 2005 and mount the antenna on the rear of the vehicle. But that's not a guarantee to get rid of the noises.