WE WERE DRIVING BETWEEN JACKSON HOLE AND THAYNE, WYOMING AND GOT INTO A HEAVY RAINSTORM AND STARTED TO EXPERIENCE A SLIGHT STEERING PROBLEM. IT WAS NOT UNTIL WE STOPPED AND PARKED FOR A FEW MINUTES AND THEN STARTED UP THAT WE REALLY EXPERIENCE A SERIOUS PROBLEM. THE STEERING WHEEL BEGAN TO SHUTTER, MAKING IT EXTREMELY DIFFICULT TO STEER THE VEHICLE TO THE POINT THAT WE FORCED TO PARK THE VEHICLE UNTIL THE NEXT MORNING. AFTER SITTING OVER NIGHT AND ALLOWED TO DRY OUT, THE STEERING IMPROVED, BUT THERE STILL REMAINED A SLIGHT SHUTTER AS WE START TO MOVE AND ATTEMPT TO STEER EITHER RIGHT OR LEFT. IT HAS LEFT US A LITTLE CONCERNED OVER THIS MATTER, CAUSING ME TO TAKE IT TO OUR LOCAL GMC DEALERSHIP (HARMON'S MOTOR, PROVO, UTAH). THEY CHECKED THE WATER SHIELDS AND FOUND THEM IN TACT SO THEY CHOSE TO REPLACE THE SERPENTINE BELT. OTHERWISE,. THERE REMAINS A SLIGHT LAG OR PAUSE IN THE STEERING ON START UP WHEN TURNING THE STEERING WHEEL, WHICH TRANSLATES INTO A SLIGHT SHUTTER. ONCE UNDER WAY, THE STEERING RETURNS TO NORMAL. *TR