Brake Controller not releasing
About every 20-30 braking events, my brake controller will not "release" the brakes even though the TV brake is not being pressed(just released). I upgrade the brake controller to a P3 and it's still doing it. So, I went into diagnostics on the brake controller and noticed the stop lamp voltage up to 14 or so when this happens. When normal towing (no braking) it's at 0.4 volts. Is this a stop lamp switch issue or something else potentially? Is the .4 voltage normal during towing? I have verified the wiring is correct on the brake controller.
TV is a 2008 Sierra Denali 6.2