inputs.text: great unit bad instructions - plug play factory harness huge plus unit steering wheel controls chimes onstar xm backup camera work no issues installed bluetooth mic paired phone no problehems works great not hooked navigation antenna yet navigation program seehems quality one install took 30 minutes gave 45 stars due user manual definetly needs improvehement might well throw trash written extrehemely poor english surprised anyone would sell unit manual however not need manual install unit like said plug play makes easy ran problehems emailed simplesoft concerns questions extrehemely quick respond resolved issues would rate 55 user manual better