Took the air dam and gear basket off to see if that improved the signal. No change in the distortion. Could not get the darn plug on the lights to disconnect so I was not able to drive around with them off to see if that helped the signal.

Stopped by a dealership that had the same truck as mine to listen to the radio to see if it sounded the same. It sounded much better so I think either the XM tuner or head unit is bad.

Back to the dealership I go!