04 Chevy Trailblazer won't move

Hello, what was the root cause of vehicle failure in the first place? You replaced the transmission initially because it won't move? Can you verify the transmission is absolutely correct for this vehicle application? Even being one year or one model off -- or paired with the wrong engine can cause electrical incompatibility with the processor of your vehicle. I would use diagnostic test equipment to monitor performance -- and commands. And verify your application is absolutely perfect. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops