1.The only tool necessary to remove the stock radio in a late-model GM truck is the ignition key. After pulling off the dash bezel, the radio uses plastic clips to hold it in place. Simply squeezing the plastic fasteners allows the radio to be pulled right out. You don't have to cut your stock wire loom. We used an adapter that plugs into the stock stereo harness. The insulation on the adapter wires tells you what each wire is used for, making installation a snap.