I was towing my boat back from the lake the other night and noticed the brake lights were on and I was not pushing the brakes. Then went to use the right turn signal and it lit up on the dash, but did not flash. The left turn signal works, but it flashed really fast. When I got home with the key out of the car, when you press the brake pedal the dash and radio come on. So I held the brake while it was running and turned it off and the car stayed running until I released the brake. Then today I got a code for the torque converter clutch circuit. I read a couple places a bad ignition switch can give faulty transmission codes on the Jimmy/Blazer's and cause other weird problems. So do we think I have a bad ignition switch here or something else or multiple problems at once?