2003 GMC Yukon Electrical System Problems

Odometer Fraud. The contact purchased a 2003 GMC Yukon XL. It was later discovered that there was a mileage discrepancy. The vehicle was a dealer sale on January 26th, 2026. At the time of purchase and at the time of the vehicle registration, the vehicle mileage was 186,000. While applying for insurance on February 20, 2026, the contact was informed that the vehicle was due for a 300,000-mile maintenance plan. The contact confirmed through the Carfax Report that the actual mileage was 300,000. The dealer was contacted and informed of the odometer fraud discovery; however, the dealer refused further contact to resolve the issue. The odometer fraud was also reported to the State Consumer Protection Division.

HEADLIGHTS AS WELL AS DAYTIME RUNNING LIGHTS DO NOT COME ON HIGHBEAMS DO HOWEVER

ABOUT A MONTH A AGO MY 2003 YUKON XL ALL OF A SUDDEN WOULD NOT DRIVE OVER15 MILES AN HR IN RUSH HOUR TRAFFIC. I TOOK THE TRUCK TO THE SHOP TO HAVE DIAGNOSTICS RAN. I WAS TOLD IT WAS THE BATTERY. THE TRUCK RAN FOR ABOUT A MONTH THEN ALL OF A SUDDEN THE BATTERY WAS BACK DEAD. RETURNED THE TRUCK BACK TO THE SHOP ANOTHER BATTERY WAS PUT IN. IT'S BEEN ABOUT ANOTHER MONTH. THIS TIME I WAS DRIVING FROM MIAMI TO JACKSONVILLE AND THE TRUCK LOST POWER 100 MILES OUTSIDE JACKSONVILLE ON I-95 NORTH. IT HAD ALL POWER JUST WOULD NOT CRANK. HAD IT TOWED TO THE SHOP NOW I'M BEING TO THERE'S A PROBLEM WITH ELECTRICAL.

THE CLUSTER FROM ALL THE DASHBOARD HAS STOP WORKING THE SPEEDOMETER THE GAUGES EVERYTHING

VEHICLE RANDOMLY GOES INTO REDUCE ENGINE POWER MODE AND STALLS WHILE DRIVING. THIS HAS HAPPENED MULTIPLE TIMES WHILE DRIVING ON A HIGHWAY AND GOING UP A HILL WHERE IT NEARLY CAUSED A THREE CATASTROPHIC ACCIDENTS. BASIC RESEARCH SHOWS THAT GM HAS KNOWN ABOUT THIS ISSUE SINCE THE VEHICLES WERE A FEW YEARS OLD AND IT AFFECTS MANY YEARS OF GM VEHICLES. THERE IS A PROBLEM WITH BAD GROUNDING CONNECTORS RELATED TO THE THROTTLE BODY SENSOR AND AND WIRING HARNESS.

SPEEDOMETER AND OTHER INSTRUMENTS ARE INACCURATELY READING. SPEEDOMETER RANGES FROM 25 - 70 MPH OVERSTATED. FUEL GAUGE REMAINS WELL IN EXCESS OF FULL UNTIL ABOUT 7 GALLONS ARE LEFT IN TANK. OIL PRESSURE IS REGISTERING WELL TO THE RIGHT OF THE HIGHEST READING. PROBLEM BEGAN DURING COLD TEMPERATURE (AROUND 10 DEGREES) AND IMPROVES WITH TEMPERATURE INCREASES BUT HAS NOT RESOLVED ITSELF. APPEARS TO BE THE SAME PROBLEM AS GM SPECIAL POLICY ADJUSTMENT 07187A. THE VIN IS WITHIN THE CATEGORY LISTED BY THE POLICY; HOWEVER, THE VEHICLE IS OLDER THAN 10 YEARS BUT FITS WITHIN THE MILEAGE RESTRICTIONS SINCE THE VEHICLE HAS LESS THAN 64,500 MILES. THIS APPEARS TO BE A KNOWN DEFECT WHICH CLEARLY IMPACTS SAFETY. THE FOLLOWING LINK DESCRIBES THE KNOWN ISSUE: HTTP://WWW.GMSPEEDOMETERRECALL.COM/GMC-SPEEDOMETER-SETTLEMENT LOCATION OF VEHICLE IS KANSAS CITY, KS SINCE I AM CURRENTLY IN THE PROCESS OF RELOCATION.

TL* THE CONTACT OWNS A 2003 GMC YUKON XL. THE CONTACT STATED THAT WHEN THE KEY CHAIN WAS ATTACHED TO THE KEYS, THE VEHICLE FAILED TO START HOWEVER, WHEN THE KEY CHAIN WAS REMOVED, THE VEHICLE START AS DESIGNED. THE VEHICLE WAS NOT TAKEN TO A DEALER NOR AN INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 220,000.

MY VEHICLE, DUE TO FACTORY ALARM SYSTEM, IS UNSAFE AND UNFIT TO DRIVE -- A DEATH TRAP ON WHEELS. IT TURNED THE VEHICLE OFF, WHILE DRIVING, AND LOCKED ME INSIDE! I WAS THANKFULLY DRIVING DOWN THE FL KEYS, ON A BRIDGE BUT AT THE END OF THE BRIDGE, SO I WAS ABLE TO COAST DOWN AND OFF THE BRIDGE TO A SHOULDER... IF IT HAD DIED ANYWHERE ELSE ON THE BRIDGE OR ON AN FLAT ROAD I MAY HAVE BEEN STUCK THERE, BLOCKING TRAFFIC AT THE MINIMUM, IN AN ACCIDENT AND DEAD IF REAR-ENDED AND PUSHED OFF BRIDGE...BECAUSE THE DOORS LOCKED AND I WOULD HAVE BEEN UNLIKELY TO ESCAPE MY SINKING TRUCK...TO SAY NOTHING OF THE FALL ITSELF. IF I HAD BEEN GOING ON THE INTERSTATE AND I WAS IN A MIDDLE LANE FOR EXAMPLE, I COULD HAVE EASILY DIED BECAUSE MY TRUCK SUDDENLY STOPPED, WITHOUT INDICATION, AND I GOT REAR ENDED BY ANY NUMBER OF VEHICLES, INCLUDING LARGE SEMI TRUCKS. IF I HAD A DEAD KEYCHAIN FOB FOR THE ALARM, I WOULD HAVE BEEN LOCKED INSIDE THE TRUCK AS WELL -- BECAUSE ONLY THE KEYCHAIN WAS ABLE TO UNLOCK THE DOORS. IF MY PHONE HAD DIED OR I HAD NO SIGNAL, I WOULD BE TRAPPED INSIDE AS WELL IF AND UNTIL HELP ARRIVED UNLESS I GOT DESPERATE ENOUGH TO SMASH OUT A WINDOW. ALL THE MECHANICS I HAVE TAKEN IT TO HAVE STRUGGLED TO RESOLVED THE ISSUE, BUT IT IS SOMETHING THE TRUCK SHOULD HAVE BEEN RECALLED FOR AND FIXED FOR FREE BY GMC -- A SERIOUS SAFETY ISSUE. I HAVE RESEARCHED AND SEEN OTHER SIMILAR TRUCKS BY GMC HAVING THE SAME PROBLEM WITH FACTORY ALARMS AND MY MECHANIC SAYS HE HAS HAD 2 OTHER, DIFFERENT MAKES/MODELS, JUST ARRIVE WITH NEARLY SAME PROBLEM, AS IF BY FATE AND HE IS HAVING TROUBLE FIXING THOSE AS WELL -- BECAUSE ITS A FACTORY EMBEDDED ALARM PROBLEMS. IT REMAINS UNFIXED TO THIS DAY AND I AM NOT ABLE TO DRIVE THE VEHICLE UNTIL IT IS FIXED.

TL* THE CONTACT OWNS A 2003 GMC YUKON XL 1500. THE CONTACT MENTIONED THAT THE PREVIOUS OWNER OF THE VEHICLE EXPERIENCED A FAILURE WITH THE REDUCED ENGINE POWER WARNING INDICATOR. THE DEALER REPLACED THE THROTTLE BODY, BUT THE FAILURE CONTINUED BEFORE THE CONTACT OWNED THE VEHICLE. THE CONTACT EXPERIENCED THE WARNING LIGHT RANDOMLY FLASHING, WHICH DRASTICALLY REDUCED THE SPEED TO LESS THAN 20 MPH. THE CONTACT HAD TO CONSTANTLY TURN OFF AND RESTART THE VEHICLE, BUT THE FAILURE CONTINUED TO PROGRESS RANDOMLY. THE DEALER REPLACED THE WIRING, 02 SENSOR, THE THROTTLE BODY WAS REPLACED A SECOND TIME, THE BATTERY, AND THE ALTERNATOR. THE REPAIRS FAILED TO PROVIDE A PERMANENT SOLUTION AND THE WARNING LIGHT CONTINUED TO ILLUMINATE FOR THE REDUCED ENGINE POWER. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED. THE APPROXIMATE FAILURE MILEAGE WAS 188,000.

INSTRUMENT CLUSTER. GAUGES RANDOMLY STICK OR FALSELY READ TO INCLUDE SPEEDOMETER. SOMETIMES IT WILL STICK AT A RANDOM SPEED. OTHER TIMES IT WILL PEG AT ITS MAX. UNKNOWN IF ODOMETER IS INVOLVED. SOMETIMES THEY RESET AFTER REPEATED START/OFF CYCLES. WAS COVERED UNDER A GM RECALL BULLETIN NO: 07187B, PAGE 8. CURRENT ODOMETER IS 145,369. SHOULD GM NOT REPAIR THIS AFTER THE WARRANTED PERIOD? THIS IS JUST AS DANGEROUS NOW THAN IT WAS AT 70,000 MILES. OIL PRESSURE GAUGE VERY RARELY READS CORRECTLY. I TRAILER TOW OFTEN AND CORRECT OIL PRESSURE IS IMPERATIVE AS IS A CORRECT SPEEDOMETER READING. ON THE TOP OF THE PAGE I DOWNLOADED FROM NHTSA IS THE NUMBER CSC-10026542-8984. PLEASE NOTE THAT THIS BEGAN TWO YEARS AGO WITH A FAULTY AMP GAUGE BUT WITHIN THE LAST SEVERAL MONTHS IT HAS NOW AFFECTED ALL GAUGES BUT THE FUEL GAUGE, WATER TEMP AND TRANSMISSION TEMP. POSSIBLY RELATED IS THE HEATED SEAT ON THE DRIVERS SIDE. THE HEAT IS ON ALL THE TIME (ON HI) AND CAN ONLY BE SHUT OFF BY UNPLUGGING THE SEAT WHICH DEACTIVATES THE AIR BAG SENSOR, POWER SEAT CONTROL AND THE LIKE. I HAVE NOT CONTACTED GM AT THIS TIME. PLEASE ADVISE ME AS TO MY COURSE OF ACTION.

SPEEDOMETER RANDOMLY STICKS, OR ACCELERATES TO MAXIMUM. OIL PRESSURE GAUGES MAX OUT AS WELL. VERY DANGEROUS TO DRIVE WITH NO CONCEPT OF SPEED, AND ALSO VERY ILLEGAL. WHEN I STOP THE VEHICLE, I CAN TURN OFF THE ENGINE. IF I CONTINUE TO TURN THE KEY 90% (BUT NOT ENOUGH TO START THE ENGINE), AND LET OFF, THE GAUGES WILL DROP UP TO 5%. AFTER 5 MINUTES OF RESETTING THE INSTRUMENTS, THE GAUGES WILL RESET. HOWEVER, THE NEXT TIME I DRIVE I MIGHT BE GOING THROUGH A SCHOOL ZONE AT 40 INSTEAD OF 25, BUT MY SPEEDOMETER SAYS 80. CLEARLY UNSAFE.

JUST BOUGHT CAR ELECTRICAL HAS BEEN ACTING UP FOR A WHILE NOW (30 DAYS) AND NOW DASH HAS GONE OUT SUNROOF WONT OPEN PR CLOSE AND DRIVER SIDE PASSENGER WINDOW DOESNT WORK AUTO STORE WONT FIX OR TAKE BACK CAR

TL* THE CONTACT OWNS A 2003 GMC YUKON. THE CONTACT STATED THAT THE INSTRUMENT CLUSTER FAILED TO FUNCTION. THE LIGHTS ON THE INSTRUMENT CLUSTER FAILED TO ILLUMINATE AND NONE OF THE GAUGES FUNCTIONED. IN ADDITION, THE DIGITAL DISPLAY WAS NOT FUNCTIONING DUE TO THE FAILURE. THE DEALER WAS NOTIFIED OF THE FAILURE AND THE VEHICLE WAS TO BE DIAGNOSED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 70,000.

WHILE DRIVING ON THE HIGHWAY AND KEEPING UP WITH TRAFFIC, I NOTICED MY SPEED WAS 75MPH. SLOWING DOWN TO THE POSTED SPEED LIMIT I WAS SUDDENLY GETTING PASSED UP BY EVERYONE. IT WASN'T UNTIL I EXITED THE HIGHWAY AND WHILE WAITING AT A STOPLIGHT I NOTICED THE SPEEDOMETER WAS READING 10MPH (WHILE STANDING STILL). CHECKING GMC AND CHEVROLET FORUMS ONLINE, THIS SEEMS TO BE A COMMON PROBLEM AND A DEFINITE SAFETY CONCERN. THE READING ON THE SPEEDOMETER WHILE IN PARK NOW VARIES BETWEEN 10-20 MPH, AND I HAVE ABSOLUTELY NO IDEA HOW FAST I'M ACTUALLY TRAVELING WHILE DRIVING. I'VE MADE AN APPT WITH THE DEALER TO HAVE IT CHECKED OUT, AND I'M SURE THE REPAIRS WILL BE EXPENSIVE! *TR

LOSING POWER THROUGHOUT MY VEHICLE. STARTED WITH THE OVERHEAD HEATING/COOLING CONTROLS. VEHICLE WILL LOCK ITSELF WITHOUT ANY KEYS WHEN DOORS ARE SHUT. (IT HAS LOCKED ME OUT ON NUMEROUS OCCASIONS) WORKED ITS WAY BACK TOWARDS THE REAR LOSING OVERHEAD LIGHTS. HEATER/AC DOES NOT WORK IN THE REAR. PASSENGER SIDE REAR DOOR WINDOW OR SEAT BELT DOES NOT WORK. FOUR WHEEL DRIVE GOES CRAZY. AND NOW THE MAIN (FRONT) HEATING AND COOLING CONTROLS ARE GOING APE [XXX] CRAZY. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR

TL* THE CONTACT OWNS A 2003 GMC YUKON. THE CONTACT STATED THAT WHILE DRIVING VARIOUS SPEEDS, SHE NOTICED THAT THE SPEEDOMETER AND TACHOMETER DISPLAYED AN ERRONEOUS READING OF ZERO. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE PROBLEM. THE APPROXIMATE FAILURE MILEAGE WAS 99,000. UPDATED 04/17/14 MA *TR

VEHICLE WENT INTO REDUCED ENGINE POWER AND STABILTRAK WARNING LIGHT CAME ON. REDUCED SPEED FROM 60 TO 10MPH. NOW OCCURS ON A REGULAR BASIS. *TR

DRIVING TO WORK AND "REDUCE ENGINE POWER" CAME ON. ENGINE STALLED OUT AND WOULD NOT GAIN SPEED. I WAS IN A LOT OF TRAFFIC WHEN THIS HAPPEN AND MY VEHICLE CAUSE A INCIDENT BECAUSE OF THE SUDDEN ENGINE REDUCED ALL SPEED. GMC SHOULD DO SOME RESEARCH ABOUT THIS PROBLEM AND INFORM THE PUBLIC OF ALL THE DANGERS THESE VEHICLES ARE CAUSING FOR PUBLIC TRANSPORTATION. THIS IS LUDICROUS THAT GMC DOES NOT HAVE THESE VEHICLE OFF HE STREETS AND DESTROYED KNOWING THAT THEY ARE PUTTING PEOPLE LIVES IN DANGER. I WILL NEVER EVER BUY A GMC VEHICLE AGAIN. *TR

I HAVE A 2003 GMC YUKON DENALI, IT RECENTLY BEGIN A SKIPPING LIKE MOTION ON THE SPEEDOMETER. THEN AFTER ABOUT A WEEK IT STARTED READING OFF BY ABOUT 30 MPH NOW WHEN DRIVING ITS SITS AT ZERO 90 PERCENT OF THE TIME, THE OTHER 10 PERCENT OF THE TIME IT STAY AT 15 MPH NO MATTER HOW FAST OR SLOW I AM MOVING. *TR

HAVE A 2003 YUKON DENALI AND WHEN IT HIT THE 131000 MILES MARK THE FUEL GAUGE STOPPED WORKING LEAVING ME TO TELL HOW MUCH GAS I HAD LEFT USING THE AUTOMATIC COMPUTER TELLING YOU HOW MANY MILES TO EMPTY. NEXT THE OIL GAUGES STOPPED WORKING. MY SPEEDOMETER QUITE WORKING LEAVING ME TO NOT KNOWING THE SPEED I AM TRAVELING THIS QUITE WORKING WHILE I WAS DRIVING DOWN A HIGHWAY. TO MAKE MATTERS WORSE MY RPMS ARE STARTING TO GO GOOFY WHICH MEANS THAT TO IS GOING TO STOP WORKING AS WELL. I WAS TOLD THAT HAVING MY DASH TAKEN OFF AND FIXED COULD RUN ANYWHERE BETWEEN 700$ NOT INCLUDING LABOR FEES. WHICH IS CRAZY THAT GMC DOESN'T STAND BEHIND ITS WORK. PEOPLE CANT AFFORD TO BE PAYING FOR THIS TO GET FIXED LET ALONE SPEEDING TICKETS. I BELIEVE SOMETHING NEEDS TO BE DONE AFTER READING ABOUT SO MANY PEOPLE HAVE THIS SAME PROBLEM WITH THE ALL HAVING THE SAME YEAR YUKON DENALI.. YOU PAY ALL THIS MONEY FOR A VEHICLE AND SOMETHING LIKE THIS HAPPENS!!! *TR