NHTSA Complaint #10415276 — 2005 GMC ENVOY

I HAVE A 2005 ENVOY, TODAY I WAS DRIVING GOING THE NORMAL SPEED AND GOT TO A STOP SIGN ALL A SUDDEN THE TRUCK STARTED REVVING UP ON ITS ON AND THEN WOULD STOP. THEN I BEGAN TO GIVE IT GAS AND TO MY SURPRISE IT DID NOT HAVE ENOUGH POWER TO GET UP A HILL.MINUTES LATER THE TRUCK BEGAN TO MOVE AS IF NOTHING WAS WRONG.I HAVE ONSTAR SO I CALLED FOR A DIAGNOSTIC CHECK, THEY STATED THAT THE COOLING SYSTEM NEEDED TO BE CHECKED , THE ANTIFREEZE MAY BE LOW AND CAN EFFECT THE WAY THE TRUCK IS PERFORMING.WELL AFTER GOING TO THE GAS STATION TO PURCHASE THE ANTIFREEZE THEN I START THE TRUCK AND IT BEGINS TO REV AGAIN ON ITS OWN AND SUDDENLY I CAN NOT MOVE...I HAD TO HAVE IT TOWED TO THE DEALER....IS THERE A RECALL ON THIS ..IM AFRAID TO DRIVE THIS IS DANGEROUS....I HAVE YOUNG CHILDREN......SOMEONE PLEASE ADVISE......I HAVE NEVER EXPERIENCED THIS BEFORE.... *TR