I had an aftermarket system installed when i bought the truck. I took it in today to have a speaker in front door replaced and an amp installed to run to the front 4 speakers and while there i decided to add rear view camera and radar detector hard wiring. got truck back before dusk, we talked for 15 mins about other stuff because i turned up system and was impressed then we made small talk about radar detectors andi had to leave. I got less than a mile away and my abs light came on and then my brake light started flashing and dinging. restarted truck 4 times with same results the whole way home. i have a 2001 chevy tahoe 4 x2 5.3liter engine. kenwood ddx719 head unit.