2003 GMC Yukon Denali

WE WERE DRIVING AT HIGHWAY SPEED AND LOST POWER WITH NO WARNING. I COASTED TO THE SIDE OF THE HIGHWAY AVOIDING ONE COLLISION. I HAD IT TOWED BACK TO HOME. THE DEALER HAD TO CLEAN THE THROTTLE BODY. I CONTACTED GM AND ASKED WHERE WAS THIS CLEANING FOR PREVENTIVE MAINTENANCE. THEY COULD NOT ANSWER. I AM FEARFUL FOR OTHERS WHO HAVE THIS TYPE OF VEHICLE. WITHOUT CLEANING THE THROTTLE BODY OTHERS WILL HAVE THIS PROBLEM TOO. I WENT TO SEVERAL INTERNET FORUMS AND MANY OTHERS HAVE STATED THIS PROBLEM. HTTP://TOWNHALL-TALK.EDMUNDS.COM/DIRECT/VIEW/.F0E807E/227 PLEASE HELP! [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR

I HAVE HAD MULTIPLE ONGOING ELECTRICAL ISSUES WITH THIS VEHICLE. STARTING IN 2005, THE EXTERIOR ELECTRONICS (I.E. SIGNAL LIGHTS, STOP LIGHTS, HEAD LIGHTS, ETC) BEGAN TO MALFUNCTION. FOR EXAMPLE, I WOULD TRIGGER THE SIGNAL FOR ONE DIRECTION AND ALL OF THE SIGNALS FOR ALL DIRECTIONS WOULD TRIGGER... EVEN PRESSING THE BRAKES TRIGGERED ALL OF THE EXTERIOR SIGNALS. THE DEALER HAD A HARD TIME ISOLATING MY PROBLEM, BUT AFTER SEVERAL VISITS, THE DEALER WAS FINALLY ABLE TO DIAGNOSE AND RECTIFY IT... THEY ISOLATED IT TO A JUNCTION BOX WHERE ALL OF THE ELECTRONICS TERMINATE. HOWEVER, BY THIS TIME, MY VEHICLE WAS OUT OF WARRANTY, SO I HAD TO COVER THE COSTS FOR REPAIRING THE PROBLEM MYSELF. MY MOST RECENT ISSUES, WHICH, BY THE WAY, SEEM TO BE COMMON ISSUES, ARE TRIGGERED BY A MESSAGE STATING, "REDUCED ENGINE POWER". THIS PARTICULAR ISSUE DOES NOT ALWAYS RENDER THE SAME RESULTS... SOMETIMES THE VEHICLE'S SPEED WILL SIGNIFICANTLY DECREASE TO NEARLY A HALT, BUT OTHER TIMES I MAY JUST EXPERIENCE INCREASED IDLING OF THE ENGINE, EVEN IF I AM AT A COMPLETE STOP. MY UNDERSTANDING, ACCORDING TO HUNDREDS OF REPORTS THAT I HAVE READ ON THE MESSAGE BOARDS, IS THAT THIS ISSUE IS CAUSED BY EITHER A WIRING HARNESS THAT LEADS FROM THE ACCELERATOR TO THE THROTTLE BODY OR IT'S A DEFECTIVE THROTTLE BODY ALTOGETHER. I HAVE EXPERIENCED INTERMITTENT ELECTRICAL PROBLEMS WITH MY WINDOWS AS WELL, BUT THIS APPEARS TO BE A MINOR ISSUE WHEN COMPARED TO THE OTHER TWO THAT I ADDRESSED ABOVE. I WILL FILE A FORMAL COMPLAINT WITH GMC CORPORATE OFFICE TODAY AND SEE WHERE THAT GOES. *TR

DECEMBER 2008- INSTRUMENT CLUSTER WENT OUT- SPEEDOMETER NO LONGER WORKING DECEMBER 2008- BATTERY GAUGE NO LONGER WORKING MARCH 2009- STABILITRAK ISSUES...SOMETIMES THE STABILITRAK WOULD WORK AND AT TIMES IT WOULD NOT WORK JULY 2009 TO JANUARY 2010- REDUCED ENGINE POWER (ALMOST CAUSE 2 WRECKS) COULD NOT PERFORM A DIAGNOSIS...COULD NOT READ COMPUTER. CHANGED FUEL PUMP. NO MORE REDUCED ENGINE POWER MESSAGE AUGUST 2011- WHEEL BEARING ISSUES. REDUCED ENGINE POWER (ALMOST CAUSED WRECK...BACKED UP TRAFFIC) SEPTEMBER 2011- GAS PEDAL STICKING NOVEMBER 2011- REDUCED ENGINE POWER...HAPPENS 5 TIMES WITHIN A 30 MILE TRIP. ATTEMPTED TO RESOLVE PROBLEM SEVERAL TIMES, BUT RUNNING OUT OF OPTIONS. HAVE TO KILL CAR IN MIDDLE OF HIGHWAY OR INTERSECTION TO GET CAR TO WORK PROPERLY. *TR

TL* THE CONTACT OWNS A 2003 GMC YUKON DENALI. THE CONTACT STATED THAT THE INSTRUMENT CLUSTER GAUGES WOULD EITHER BECOME STUCK OR WOULD FLICKER BACK AND FORTH BETWEEN READINGS. THE DEALER AND THE MANUFACTURER WERE NOTIFIED OF THE FAILURE BUT DENIED ANY ASSISTANCE WITH REPAIRS. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 100,000 AND THE CURRENT MILEAGE WAS 119,000.

ALL OF THE BRAKE LINES ARE COMPLETELY RUSTED OUT. MY WIFE HAD A COMPLETE BRAKE FAILURE WHILE DRIVING MY DAUGHTER TO SCHOOL. BRAKE LINE OVER FRAME LEADING FRONT TO BACK FAILED AND COMPLETELY EMPTIED THE MASTER CYLINDER OF BRAKE FLUID, RESULT CAR WOULD NOT STOP. THIS MUST BE MADE INTO A RECALL, AS THE POSSIBILITY OF A MAJOR ACCIDENT AND LOSS OF LIFE IS VERY PROBABLE. *TR

WHEN THE TOP RIGHT HINGE BROKE AWAY FROM THE GLASS ON THE REAR DOOR OF MY 2003 YUKON DENALI (~50,000 MI.), AND AFTER DISCUSSING IT WITH MY DEALER, I THOUGHT IT WAS AN ISOLATED CASE. THE RESULTING TWISTING OF THE MISALIGNED WINDOW HAS CAUSED THE LEFT HINGE BOND TO PARTIALLY CRACK AND SEPARATE AS WELL. MY VEHICLE IS GARAGED 90+% OF THE TIME AND I SELDOM USED THE REAR WINDOW. CURRENTLY, THE ONLY THING HOLDING THIS WINDOW TO THE VEHICLE IS THE DOOR LOCK AND ONE PARTIAL (LEFT) HINGE. IT IS A DISASTER WAITING TO HAPPEN. MY DEALER WOULD NOT DO ANYTHING, OTHER THAN REPLACE THE ENTIRE BACK DOOR AT $1,000. MY INSURANCE COMPANY WOULDN'T EITHER SAYING THERE WAS NO BROKEN GLASS. I FEEL THE ABOVE DEFECT, ALONG WITH OVER 100 FORUM EXACT SAME DESCRIPTIONS ARE JUST A SMALL PORTION OF THIS TOTAL PROBLEM WITH BOTH THE CHEVY AND GMC VEHICLES OF THIS ERA. *TR

RANDOMLY, THE TRUCK WILL GO FROM DRIVING COMPLETELY NORMAL TO GETTING A MESSAGE SAYING "REDUCED ENGINE POWER" AND THEN IT CUTS OFF POWER. THIS HAS HAPPENED 10 TO 12 TIMES, THE LAST TIME IT HAPPENED I COULD NOT DRIVE MORE THAN APPROX 35 MPH EVEN WITH THE GAS PEDAL FLOORED. WE HAVE REPLACED THE SUPPOSEDLY DEFECTIVE PART(S) TO NO AVAIL.

MY HEATED SEATS STOPPED WORKING. WHEN MY TRUCK WAS IN THE SHOP WITH MY MECHANIC I ASKED IF HE COULD LOOK AND SEE WHAT THE ISSUE IS. WHEN HE TOOK APART THE SEAT THE HEATING PAD WAS BURNT TO A CRISP. HE CALLED THE GM DEALER NEAR BY AND ASKED WHAT THE ISSUE COULD BE AND THEY SAID A SHORT IN THE HEATING PAD WIRE. THIS PART OBVIOUSLY CAUGHT FIRE IN MY VEHICLE. I CALLED GM CORPORATE TODAY AND THEY SAID SINCE THE REPAIR WAS NOT DONE AT GM THERE IS NOTHING THEY WILL DO FOR ME. MY CAR COULD HAVE COMPLETED CAUGHT FIRE WITH MYSELF AND MY DAUGHTER IN IT. JUST BECAUSE THE REPAIR WAS NOT DONE THERE BUT THE PARTS WERE BOUGHT AT THE GM DEALER THEY WONT REIMBURSE ME FOR THE PARTS AND LABOR. THIS IS NOT A RECALL ITEM FROM WHAT I CAN SEE ONLINE. *TR

WHILE DRIVING ON A TRIP THE SPEEDOMETER IN MY 2003 GMC YUKON DENALI FROZE ON 72 MPH. SPEEDOMETER REMAINED STUCK ON 72 MPH FOR THE NEXT 2 HOURS, STILL SHOWING 72 MPH EVEN WHEN THE VEHICLE WAS COMPLETELY STOPPED. I SHUT THE CAR OFF AND RESTARTED IT WHENEVER POSSIBLE FOR THE NEXT 2 HOURS. EACH TIME AFTER I WOULD RESTART THE VEHICLE THE SPEEDOMETER WOULD DROP SLIGHTLY (ABOUT 5 - 10 MPH AT A TIME) TILL IT REACHED 36MPH, THEN IT WOULD NOT DROP ANY LOWER. SPEEDOMETER REMAINED STUCK ON 36 MPH FOR 2 DAYS. I EVENTUALLY DISCONNECTED THE VEHICLES BATTERY FOR APPROX. 30 MINUTES. AFTER RECONNECTING BATTERY SPEEDOMETER APPEARED TO CORRECT ITSELF. DURING THE NEXT MONTH I HAVE HAD NUMEROUS, SPORADIC INCIDENTS WHERE THE SPEEDOMETER WILL FREEZE UP WHILE DRIVING. THIS IS A VERY UNSAFE AND POTENTIALLY DANGEROUS SITUATION. ALSO THE LIGHT DIRECTLY BEHIND THE SPEEDOMETER HAS BURNT OUT, AS WELL AS NUMEROUS OTHER GAUGE, SWITCH, AND INDICATOR LIGHTS. *TR