NHTSA Complaint #10342758 — 2005 GMC ENVOY

CAR SWITCHES INTO ALL 4W AND HIGHER BY ITSELF. I HAD BEEN TO A DEALERSHIP 3 TIMES IN ONE YEAR FOR WHICH THEY WERE UNABLE TO FIND THE PROBLEM. NOW MY WARRANTY IS UP. AFTER THAT I TOOK IT TO A TRANSMISSION SHOP WHERE THEY SUPPOSEDLY FIXED THE PROBLEM FOR OVER 800.$ A WEEK LATER IT DID IT AGAIN. NOW I HAVE THE 4WD DISCONNECTED FOR SAFETY REASONS. I WOULD BE DRIVING ON THE FREEWAY AT 60-75 MPH AND IF WOULD SWITCH AND NOT COME OUT NO MATTER WHAT I DO. I HAVE OWNED THIS VEHICLE FOR ALMOST 5 YEARS AND IT HAS DONE THIS THE WHOLE TIME. I AM A SINGLE MOM AND I DRIVE MY 17 AND 7 YEAR OLD AROUND IN THIS CAR. EVEN WITH IT DISCONNECTED IT STILL TRIES TO SWITCH. THERE IS NO SPECIFIC TIME, TEMPERATURE, OR OTHER REASON THIS HAPPENS. IT HAS HAPPENED WHEN I TURN ON THE CAR AND SOMETIMES I CAN GO A COUPLE OF WEEKS AND OTHER TIMES IT HAPPENS DAILY. I ALSO HAVE HAD MY LIGHTS NOT GO ON FOR NO REASON AND ALSO THE DOORS LOCK AND CAN ONLY BE UNLOCKED BY USING THE KEY. AND THE HATCHBACK WILL NOT OPEN AT ALL WHEN THIS HAPPENS. ELECTRICAL?? HELP!! *TR