Trailblazer 2004 4.2autom

Won't move when shifted. Ecu replaced still doesn't move. When I push on the gas and brake the reduced engine power came on. Also the odometer light doesn't display. I just got the car and it came with a replacement ECU that I replaced myself but couldn't finish the key procedure thing because the security light won't stay on for 10 minutes Some sort of weirdish noise near steering area around the dash. I've also took the dash out and put it back in to see if that would make the odometer work. Nothing worked.