I would like to install a backup beeper for my 2008 Silverado. Usually, the wiring is very simple - just connect it to your backup light and you are done. However, on the 2008 Siverado, the backup lights come on when you lock/unlock the truck, etc. Having a truck with a backup beeper going off and no driver could be very disconcerting for obvious reasons. Is there any way to wire the beeper so it only goes off when the ignition is on. Has anyone installed a backup beeper in a 2008 Silverado?