We have an 07 Trailblazer(same thing as Envoy) and after the transfer case shifts to neutral it says to shift to drive for a couple seconds and then to reverse and then shut off engine and put into park. On ours you shut the key off and you don't have to pull any fuses. It has no steering wheel lock. I had a shop wire mine with diodes so it uses the lights on the back of the vehicle. We have towed ours for 20,000 miles or so with no problems. Great toad selection. I got a Ready Brake setup for mine and I would not be without it. It is cheap,works great and less things to go wrong.