Hey guys Ive been to the dealership but its like a bunch of idiots work there and can never order the right part. My problem is when i have the radio on at a normal level and i am in reverse, when the sensors find an obstacle they beep but do not mute the radio level. In the manual it says the parking system should mute the radio to a predetermined level. Can anybody else tell me if their truck mutes the radio a little when the sensors pick up an obstacle. I have an 08 lariat with the 6 disk radio. They have replaced the radio and now are ordering me a parking module. Thanks for the help.