2003 GMC Yukon Xl 1500

ARRIVED HOME ONE EVENING AND NOTICED MY SPEEDOMETER WAS READING 43 MPH WHILE SITTING STILL IN THE DRIVEWAY. AT FIRST IT WAS ACCURATE BY SUBTRACTING THE ERROR TO CALCULATE THE SPEED BUT HAS SUBSEQUENTLY BECOME ERRATIC IN IT'S INACCURACY TO THE POINT OF TOTAL UNRELIABILITY. I FEAR THE CONSEQUENCES RELATING TO NOT BEING ABLE TO DETERMINE THE SPEED, SUCH AS TRAFFIC TICKETS AND SUCH. IT IS A SAFETY ISSUE AS WELL AS I TRAVEL THROUGH NUMEROUS SCHOOL ZONES IN MY DAILY TRAVELS. IT REMAINS UNREPAIRED AND WILL BE SO SINCE I DON'T HAVE $500 LAYING AROUND TO REPLACE A DEFECTIVE SPEEDOMETER. UPON SEARCHING THE INTERNET I WAS SURPRISED TO FIND THERE ARE MANY, MANY OTHERS WHO HAVE THIS IDENTICAL PROBLEM, WHICH TELLS ME THERE IS A DEFECTIVE DESIGN, AND AS SUCH I BELIEVE THIS ISSUE SHOULD BE RESOLVED WITH THE OWNERS OF THESE VEHICLES BY GENERAL MOTORS CORP. *NM

I PULLED OUT OF MY DRIVEWAY IN MY 2003 GMC YUKON XL AND ONLY WENT A SHORT DISTANCE WHEN I NOTICED THE ENGINE WAS VERY SLUGGISH AND THE DIC SHOWED "REDUCED ENGINE POWER". I TURNED AROUND AND WENT HOME. I SHUT THE VEHICLE OFF. WHEN I STARTED IT UP A LITTLE WHILE LATER IT WAS FINE. I CALLED THE DEALERSHIP WHERE I PURCHASED IT AND THEY SAID THAT THIS WAS COMMON AND IT WAS DUE TO REFUELING WITH THE VEHICLE RUNNING OR A LOOSE GAS CAP...NEITHER OF THESE HAD HAPPENED IN MY CASE. THE NEXT DAY I HAD MY THREE CHILDREN IN THE VEHICLE AND WAS DRIVING SOUTH ON RT. 95 WHEN THE VEHICLE JUST SHUT DOWN. I LOST ALL ABILITY TO MANEUVER THE VEHICLE. THE VEHICLE WOULD NOT START AND HAD TO BE TOWED. THE MECHANIC THAT TOWED IT READ THE DTC'S AND FOUND THE FOLLOWING: -CLASS 2 DATA LINK MALFUNCTION. - BODY CONTROL MODULE. - PCM TO TAC MODULE SERIAL DATA CONNECTION. I PLACED A CALL TO GMC ON 9/2 TO REPORT THE PROBLEM AND THE DANGER IT HAD PLACED MY FAMILY IN. THEY TOLD ME IT HAD TO GO TO A DEALERSHIP FOR AN OFFICIAL DIAGNOSIS. AFTER RESEARCHING THIS ISSUE I HAVE FOUND THAT THE SAME PROBLEM HAS OCCURRED NUMEROUS TIMES W/ OTHER YUKONS AS WELL AS 2003 CHEVY AVALANCHES. AFTER READING THE TECHNICAL SERVICE BULLETINS REGARDING THIS ISSUE IT IS VERY APPARENT THAT GMC IS FULLY AWARE OF THIS VERY SERIOUS SAFETY ISSUE BUT HAS CHOSEN TO IGNORE IT PUTTING MILLIONS AT RISK EVERY DAY. SOMEONE NEEDS TO ADDRESS THIS BEFORE MORE PEOPLE GET HURT. *NM