If you don't have any luck with the factory parts, look at the echomaster brand kit. It looks factory, the sensors come black or silver and can be painted. Easy install and good quality.

 

LOL!

 

I just bought my '06 XLT and one of the only features it didn't come with is the RSS. I had the dealer install it and they used Echomaster which from everything I can find is the supplier for the OEM installs. So the only diff is that the assembly line didn't install it and the beeps don't come through the speakers. The system has it's own little speaker that is concealed.

Also, they drilled two holes in the bumper. It looks totally factory, I'm pleased with the install and it works great.

 

Has anyone bought the color matched sensors from the Five Hundred to replace the black ones on our trucks? They stand out on a white bumper.