NHTSA owner reports · September 18, 2026 snapshot.
Electrical System complaints
183 reportsClear category filter52,000 miles · Jun 25, 2009
Electrical System
PROBLEM JUST STARTED WITH NO WARNING. SPEEDOMETER READS 60 MPH WHILE VEHICLE IS PARKED WITH ENGINE OFF. WHEN YOU CRANK THE VEHICLE. SPEEDOMETER INDICATOR DROPS DOWN APPROX. 5 MPH (55 MPH) THEN WHEN YOU DRIVE THE VEHICLE THE SPEEDOMETER INDICATOR (NEEDLE) GOES PAST THE 120 READING ON THE SPEEDOMETER. I FEEL THIS IS VERY DANGEROUS…
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PROBLEM JUST STARTED WITH NO WARNING. SPEEDOMETER READS 60 MPH WHILE VEHICLE IS PARKED WITH ENGINE OFF. WHEN YOU CRANK THE VEHICLE. SPEEDOMETER INDICATOR DROPS DOWN APPROX. 5 MPH (55 MPH) THEN WHEN YOU DRIVE THE VEHICLE THE SPEEDOMETER INDICATOR (NEEDLE) GOES PAST THE 120 READING ON THE SPEEDOMETER. I FEEL THIS IS VERY DANGEROUS BECAUSE YOU CANNOT DETERMINE THE TRUE SPEED VEHICLE IS REALLY GOING . VEHICLE ODOMETER AND TRIP ODOMETER ARE NOT AFFECTED (CHECKED BY MILE MARKER ON INTERSTATE). FAILURE IS CONSISTENCE . OCCURS EVERYTIME VEHICLE IS OPERATED. NOTIFIED DEALERSHIP AND THEY SAID (NO RECALL) . VEHICLE HAS APPROX 52,000 MILES. *TR
NHTSA ODI #10274907
58,000 miles · Jun 20, 2009
Electrical SystemFuel System, Gasoline
I HAVE A 2005 GMC ENVOY. THE ENVOY BEGAN EXPERIENCING PROBLEMS AT APPROXIMATELY 58, 000 MILES WHEN THE GAS TANK BEGAN READING EMPTY NO MATTER HOW MUCH GAS WAS IN THE TANK. EVENTUALLY, AFTER MUCH COMPLAINING TO MY LOCAL DEALERSHIP THEY STATED THEY WOULD ONLY REPAIR THE PROBLEM IF I PAID FOR HALF OF THE REPAIRS. I REFUSED. LATER, …
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I HAVE A 2005 GMC ENVOY. THE ENVOY BEGAN EXPERIENCING PROBLEMS AT APPROXIMATELY 58, 000 MILES WHEN THE GAS TANK BEGAN READING EMPTY NO MATTER HOW MUCH GAS WAS IN THE TANK. EVENTUALLY, AFTER MUCH COMPLAINING TO MY LOCAL DEALERSHIP THEY STATED THEY WOULD ONLY REPAIR THE PROBLEM IF I PAID FOR HALF OF THE REPAIRS. I REFUSED. LATER, AT APPROXIMATELY 80,000 MILES, MY SPEEDOMETER BEGAN MALFUNCTIONING. THE SPEEDOMETER WORKS INTERMITTENTLY, JUST RECENTLY IT WAS STUCK AT 120 MPH EVEN IN PARK. NOW, THE BATTERY GAUGE HAS BEGUN TO MALFUNCTION. THE BATTERY CHARGE RANGES FROM THE LOWEST TO THE HIGHEST WITH NO REAL RHYME OR REASON. IT IS APPARENT BY READING ON THE INTERNET FORUMS THAT THIS IS A MAJOR PRODUCT DEFECT AS IT HAPPENS TO MANY, MANY GMC OWNERS, ESPECIALLY 2002-2005 ENVOY OWNERS. I HAVE FILED COMPLAINTS WITH GMC DIRECTLY AND RECEIVED RESPONSES THAT ARE NOT SATISFACTORY. THESE ITEMS SHOULD BE A RECALL EFFORT AND REPAIRED BY GMC AS THEY ARE CLEARLY PRODUCT DEFAULT NOT JUST GENERAL WARE AND TEAR OF THE VEHICLE. THESE PROBLEMS ARE COSTLY AND PRESENT SAFETY ISSUES WHILE DRIVING. *TR
NHTSA ODI #10274407
54,027 miles · May 2, 2009
Electrical System
2005 GMC ENVOY HAS ERRATIC SPEEDOMETER. NOT SAFE TO DRIVE WHEN SPEEDOMETER KEEPS GETTING STUCK. *TR
NHTSA ODI #10267541
56,000 miles · Apr 14, 2009
Electrical SystemFuel System, Gasoline
GAS GAUGE HAS NOT WORKED SINCE 2007. HEADLIGHTS AND SOME DASH LIGHTS AS WELL AS EXT TEMP GAUGE SOMETIMES FLICKER. NO POSITIVE RESPONSE FROM DEALER FOR GAS GAUGE. WAS INITIALLY TOLD HEADLIGHTS WERE SUPPOSED TO DO THIS, A "FEATURE". I ASKED THEM TO DOCUMENT THIS FOR ME, THEY SAID THEY WOULD LOOK AT IT. REPLACE BODY CONTROL MO…
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GAS GAUGE HAS NOT WORKED SINCE 2007. HEADLIGHTS AND SOME DASH LIGHTS AS WELL AS EXT TEMP GAUGE SOMETIMES FLICKER. NO POSITIVE RESPONSE FROM DEALER FOR GAS GAUGE. WAS INITIALLY TOLD HEADLIGHTS WERE SUPPOSED TO DO THIS, A "FEATURE". I ASKED THEM TO DOCUMENT THIS FOR ME, THEY SAID THEY WOULD LOOK AT IT. REPLACE BODY CONTROL MODULE, NO CHANGE. SAID IT COULD BE THIS OR THAT, BUT OUT OF WARRANTY AT MY EXPENSE. I TOLD THEM I WOULD PAY FOR IT, BUT IF IT DID NOT FIX THE PROBLEM I WOULD NOT. THEY REFUSED TO WORK FURTHER ON IT. *TR
NHTSA ODI #10265211
77,000 miles · Feb 22, 2009
Electrical SystemFuel System, Gasoline
I HAVE A 2005 GMC ENVOY THAT HAS JUST STARTED HAVING ISSUES WITH THE FUEL GAUGE. I HAVE FILLED THE GAS TANK AND THE GAUGE READS EMPTY WITH THE FUEL LIGHT ON. THEN 10 MINUTES LATER THE LIGHT GOES OUT AND IT READS THAT I DO HAVE FUEL. THEN A LITTLE LATER IT STARTS GOING DOWN AND READS EMPTY AGAIN. I HAVE RE-STOPPED TO GET GA…
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I HAVE A 2005 GMC ENVOY THAT HAS JUST STARTED HAVING ISSUES WITH THE FUEL GAUGE. I HAVE FILLED THE GAS TANK AND THE GAUGE READS EMPTY WITH THE FUEL LIGHT ON. THEN 10 MINUTES LATER THE LIGHT GOES OUT AND IT READS THAT I DO HAVE FUEL. THEN A LITTLE LATER IT STARTS GOING DOWN AND READS EMPTY AGAIN. I HAVE RE-STOPPED TO GET GAS TO FIND THAT THE TANK IS FULL. THIS IS WRONG AND THERE SHOULD BE A RECALL ON THIS ITEM. IT DRAWS THE DRIVER'S ATTENTION AWAY FROM DRIVING AND MUST HAVE CAUSED ACCIDENTS SOMEWHERE IN THE USA. *TR
NHTSA ODI #10259588
Mileage unknown · Feb 19, 2009
Electrical System
I HAVE HAD MY 05 GMC ENVOY FOR SEVERAL MONTHS NOW AND HAVE TAKEN IT TO BE REPAIRED AT LEAST ONCE A MONTH! MY ISSUE IS WITH THE ELECTRICAL SYSTEM AND THE HEADLIGHTS AND CONSOLE "FLASHING" AT NIGHT. I HAVE TAKEN IT TO THE DEALERSHIP TWICE AND THE FIRST TIME THEY CHECKED THE BATTERY, SOME CABLES AND GAVE IT BACK TO ME SAYING THEY…
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I HAVE HAD MY 05 GMC ENVOY FOR SEVERAL MONTHS NOW AND HAVE TAKEN IT TO BE REPAIRED AT LEAST ONCE A MONTH! MY ISSUE IS WITH THE ELECTRICAL SYSTEM AND THE HEADLIGHTS AND CONSOLE "FLASHING" AT NIGHT. I HAVE TAKEN IT TO THE DEALERSHIP TWICE AND THE FIRST TIME THEY CHECKED THE BATTERY, SOME CABLES AND GAVE IT BACK TO ME SAYING THEY COULD NOT FIND ANYTHING. THE SECOND TIME I TOOK IT BACK ABOUT A MONTH LATER BECAUSE THE LIGHT WERE STILL FLASHING. THE DEALERSHIP HAD IT FOR 2 DAYS AND TOLD ME IT WAS MY ALTERNATOR. I DID NOT BELIEVE THEM AND DID NOT GET MY ALTERNATOR CHANGED ($675.00) AND MY CAR HAS BEEN STARTING AND RUNNING FINE. MY HEADLIGHTS STILL FLICKER, BUT THERE IS NOTHING I CAN DO ABOUT IT. I HAVE READ SEVERAL OTHER COMPLAINTS ABOUT THIS AND MOST OF THEM GO THROUGH A NEW BATTERY AND ALTERNATOR AND IT STILL DOES NOT FIX THE PROBLEM. THIS IS SOMETHING GMC NEEDS TO LOOK INTO AND FIX BECAUSE IT IS A HUGE SAFETY HAZARD. *TR
NHTSA ODI #10259325
44,864 miles · Feb 11, 2009
Air BagsElectrical SystemInjury
THE CHECK ENGINE LIGHT KEPT COMING ON AND I TOOK IT TO THE DEALER FOR REPAIR AND WAS TOLD "IT'S OK. FORGET IT." ON 01-09-2009 WHILE TRAVELING ON TEXAS HIGHWAY 60, I HAD THE CRUISE CONTROL SET FOR 70 MPH. TRAFFIC WAS NORMAL BUT CONTINUALLY PASSED ME AS IF I WAS GOING SLOWER. I PULLED OVER AT A CONVENIENCE STORE AND PARKED THE V…
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THE CHECK ENGINE LIGHT KEPT COMING ON AND I TOOK IT TO THE DEALER FOR REPAIR AND WAS TOLD "IT'S OK. FORGET IT." ON 01-09-2009 WHILE TRAVELING ON TEXAS HIGHWAY 60, I HAD THE CRUISE CONTROL SET FOR 70 MPH. TRAFFIC WAS NORMAL BUT CONTINUALLY PASSED ME AS IF I WAS GOING SLOWER. I PULLED OVER AT A CONVENIENCE STORE AND PARKED THE VEHICLE. THE SPEEDOMETER REGISTERED 45 MPH IN PARK. I CONTINUED HOME GAUGING SPEED BY THE OTHER TRAFFIC. THE VEHICLE WAS PARKED. ON 01-14-2009, MY WIFE AND DAUGHTER WERE IN THE VEHICLE RETURNING FROM SCHOOL. THE SPEEDOMETER APPEARED TO BE WORKING. AT APPROXIMATELY 3:00 PM WHILE DRIVING HOME, THE ELECTRIC DOOR LOCKS BEGAN TO LOCK AND UNLOCK THEMSELVES. AT THE SAME TIME, THE A/C WENT TO MAXIMUM HEAT AND HIGH BLOWER. MY WIFE STOPPED THE VEHICLE AND PUT IT IN PARK. THE SIDE CURTAIN AIR BAGS DEPLOYED, STRIKING MY DAUGHTER IN THE LEFT TEMPLE RESULTING IN A MILD CONCUSSION. ONSTAR NOTIFIED THE POLICE OF A COLLISION. I CONTACTED THE DEALER WHO REFERRED ME TO GMC CUSTOMER ASSISTANCE. THE AGENT TOLD ME THAT THIS KIND OF THING HAPPENS WHEN TRAVELING TOO FAST AND TURNING TOO SHARP. AN INVESTIGATOR WAS DISPATCHED TO GATHER COMPUTER INFORMATION AND DETERMINE IF THERE HAD BEEN A COLLISION. HIS RESULTS WERE THERE WAS NO COLLISION AND THE BAGS DEPLOYED PER COMMAND FROM THE VEHICLE CONTROL SYSTEM BASED ON THE VEHICLE TRAVELING 20 MPH AND TURNING TOO SHARP. THE VEHICLE WAS ACTUALLY TRAVELING 20 MPH ON A RESIDENTIAL STREET IN A STRAIGHT LINE. TURNING RIGHT WOULD HAVE RESULTED IN GOING THROUGH A FENCE AND LEFT WOULD HAVE PUT THE VEHICLE IN A PARK. GMC REFUSED TO INVESTIGATE THE DISCREPANCIES BETWEEN THE COMPUTER AND THE DRIVER'S ACCOUNT FURTHER. I CONTACTED A LOCAL GM DEALER WHO HAS AS MUCH CONCERN ABOUT THIS INCIDENT AS I DO. NO REPAIRS HAVE BEEN INITIATED TO DATE AS IT IS UNCLEAR WHAT IS AT FAULT. SEVERAL GM TECHNICIANS AND SERVICE MANAGERS BELIEVE THERE IS A PROBLEM WITH THE VEHICLE CONTROL SYSTEM BUT ARE UNABLE TO PROCEED WITHOUT APPROVAL. *TR
NHTSA ODI #10258343
25,000 miles · Jan 31, 2009
Electrical System
THE HEADLIGHTS & DASH LIGHTS FLICKER & GO OUT WHILE DRIVING AT NIGHT TIME , NO WEATHER BEING A FACTOR & NO OTHER THINGS EITHER. OTHER PEOPLE EXP. THE SAME PROB !!!! THE VOLTAGE METER IS DROPPING DURING THIS PERIOD ALSO .HAVE HAD BACK TO DEALER THEY TIGHTENED THE BATTERY CABLES & ALSO PUT PADS BEHIND THE CABLES THIS WAS NOT A FIX…
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THE HEADLIGHTS & DASH LIGHTS FLICKER & GO OUT WHILE DRIVING AT NIGHT TIME , NO WEATHER BEING A FACTOR & NO OTHER THINGS EITHER. OTHER PEOPLE EXP. THE SAME PROB !!!! THE VOLTAGE METER IS DROPPING DURING THIS PERIOD ALSO .HAVE HAD BACK TO DEALER THEY TIGHTENED THE BATTERY CABLES & ALSO PUT PADS BEHIND THE CABLES THIS WAS NOT A FIX !!!!!!! WHAT CAN BE DONE TO FIX THIS MAJOR PROBLEM SAFETY!!!!! THIS HAPPENS ALMOST EVERY TIME YOU DRIVE AND THE LIGHTS ARE ON!!!!!! *TR
NHTSA ODI #10257065
96,160 miles · Nov 26, 2008
Electrical System
THE GMC ENVOY'S SPEEDOMETER STOPPED WORKING AND GMC IS AWARE OF THIS ISSUE AND ONLY SOLUTION THEY HAVE IS 450 + LABOR WHICH DOESN'T GUARANTEE THE ISSUE IS RESOLVED...I HAVE RESEARCHED NUMEROUS ARTICLES AS WELL AS WEBSITES WHERE OTHER GM VICTIMS HAVE REPORTED THEIR VEHICLES TO DO THE SAME THING....THE SPEEDOMETER IS SOMETHING VER…
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THE GMC ENVOY'S SPEEDOMETER STOPPED WORKING AND GMC IS AWARE OF THIS ISSUE AND ONLY SOLUTION THEY HAVE IS 450 + LABOR WHICH DOESN'T GUARANTEE THE ISSUE IS RESOLVED...I HAVE RESEARCHED NUMEROUS ARTICLES AS WELL AS WEBSITES WHERE OTHER GM VICTIMS HAVE REPORTED THEIR VEHICLES TO DO THE SAME THING....THE SPEEDOMETER IS SOMETHING VERY IMPORTANT WHICH SHOULDN'T BE A COMMON PROBLEM, SERIOUS IF NOT LIFE TAKING ACCIDENTS HAPPEN WHEN DRIVERS AREN'T ABLE TO BE AWARE OF THEIR SPEED. I WOULD HOPE THAT THIS COMPLAINT WILL FOLLOW WITH OTHERS AND THERE WILL BE SOME TYPE RECALL THAT TAKES PLACE. *TR
NHTSA ODI #10249949
2,900 miles · Oct 24, 2008
Electrical SystemEngine And Engine CoolingExterior Lighting
TL*THE CONTACT OWNS A 2005 GMC ENVOY. THE CONTACT STATED THAT HE WAS EXPERIENCING ISSUES WITH THE HEADLIGHTS. WHEN HIS WIFE WOULD DRIVE THE VEHICLE AT 50 MPH, THE HEADLIGHTS WOULD GET DIMMER AND DIMMER AND THEN BRIGHTEN AGAIN. ON ONE OCCASION, THE LIGHTS TURNED OFF COMPLETELY AND HIS WIFE HAD TO DRIVE HOME WITH THE HAZARD LIG…
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TL*THE CONTACT OWNS A 2005 GMC ENVOY. THE CONTACT STATED THAT HE WAS EXPERIENCING ISSUES WITH THE HEADLIGHTS. WHEN HIS WIFE WOULD DRIVE THE VEHICLE AT 50 MPH, THE HEADLIGHTS WOULD GET DIMMER AND DIMMER AND THEN BRIGHTEN AGAIN. ON ONE OCCASION, THE LIGHTS TURNED OFF COMPLETELY AND HIS WIFE HAD TO DRIVE HOME WITH THE HAZARD LIGHTS FLASHING. THE ISSUE OCCURRED INTERMITTENTLY. THE CONTACT TOOK THE VEHICLE TO THE DEALER AT LEAST FOUR TIMES AND THEY CHANGED THE SWITCHES AND RECALIBRATED THE LIGHTS. THE REPAIRS CAUSED OTHER FAILURES; THEREFORE, THEY RECALIBRATED TO THE ORIGINAL LIGHTS. THE DEALER STATED THAT THERE WAS NO REMEDY FOR THE FAILURE. THE MANUFACTURER STATED THAT THEY WOULD START A CASE FOR HIM AND CALL HIM BACK. THE CURRENT MILEAGE WAS APPROXIMATELY 41,000 AND FAILURE MILEAGE WAS APPROXIMATELY 23,000. UPDATED 11/14/08 *CN THE CHECK ENGINE LIGHT ILLUMINATED. THE DEALER REPLACED THE O2 SENSOR. UPDATED 11/18/08. *JB
NHTSA ODI #10246645
NHTSA investigations
2RQ17002 · Loss Of Headlights
Opened Apr 24, 2017 · Closed Mar 29, 2021
Status: closed (inferred from source dates) · Exterior Lighting:headlights
The subject vehicles are model year (MY) 2002-2009 Chevrolet Trailblazer, GMC Envoy, 2004-2007 Buick Rainier, 2003-2008 Isuzu Ascender, 2005-2009 Saab 9-7X, 2002-2004 Oldsmobile Bravada, 2003-2006 Chevrolet SSR, 2005-2009 Buick Lacrosse, and 2006-2008 Pontiac Grand Prix. This scope includes the Trailblazer/Envoy variants: 2002-2006 Envoy XL/Trailblazer EXT and 2004-2005 Envoy XUV. The original scope of this investigation was expanded to include all vehicles equipped with the subject Headlight Driver Module (HDM). The focus of the investigation was to determine whether actions performed by General Motors adequately addressed any unreasonable risk to motor vehicle safety in the subject vehicles concerning the headlights and the HDM that controls them.Under normal electrical load and environmental conditions, the HDM can overheat inside the Underhood Electrical Center (UEC). This can cause the module to fail and result in a simultaneous loss of both low beam headlights and both daytime running lights (DRLs), often with no warning or prior detectability to the driver. This failure can be intermittent or permanent. No other exterior lights are affected. High beams, turn signals, brake lights, and reverse lights are still operational.General Motors addressed this issue with 2 recalls (14V755 & 15V519) and a special coverage program (N172091910). In view of the recalls and special coverage program implemented by GM and the vehicle high beams continuing to operate, ODI has tentatively concluded that the actions taken by GM mitigate any unreasonable risk to safety posed by HDM failure in the subject vehicles.Accordingly, the investigation is closed. The closing of this investigation does not constitute a finding by NHTSA that a safety-related defect does not exist. The agency reserves the right to take additional action if warranted by new circumstances.The ODI reports cited above are available for review online at NHTSA.gov under the identification numbers in the attached document.
DP10001 · Fuel Level Gauge System Failure
Opened Jan 7, 2010 · Closed May 23, 2011
Status: closed (inferred from source dates) · Fuel System, Other; Fuel System, Other:storage:fuel Gauge System
The Office of Defects Investigation has received 668 complaints alleging inaccurate fuel gauge reading while driving in model year 2005-07 Chevrolet Trailblazer, GMC Envoy, Buick Rainier, and Saab 9-7x vehicles.Of the 668 complaints, 58 incidents were alleged to result in a vehicle stall.Of the 58 stalling incidents, 43 complaints reported stalling because the fuel level reading indicated more fuel availability than what is actually in the fuel tank. One complaint alleged a vehicle crash after the vehicle stalled while exiting the interstate, became disabled, and was struck from behind.Summarily, the complaints show an apparent increasing trend, with most complaints received within the past year.A Preliminary Evaluation has been opened to assess the scope, frequency and potential safety consequences associated with the alleged defect.
Additional source detail variants (2)
Fuel System, Other
The Office of Defects Investigation has received 668 complaints alleging inaccurate fuel gauge reading while driving in model year 2005-07 Chevrolet Trailblazer, GMC Envoy, Buick Rainier, and Saab 9-7x vehicles.Of the 668 complaints, 58 incidents were alleged to result in a vehicle stall.Of the 58 stalling incidents, 43 complaints reported stalling because the fuel level reading indicated more fuel availability than what is actually in the fuel tank. One complaint alleged a vehicle crash after the vehicle stalled while exiting the interstate, became disabled, and was struck from behind.Summarily, the complaints show an apparent increasing trend, with most complaints received within the past year.A Preliminary Evaluation has been opened to assess the scope, frequency and potential safety consequences associated with the alleged defect.
Fuel System, Other:storage:fuel Gauge System
The Office of Defects Investigation has received 668 complaints alleging inaccurate fuel gauge reading while driving in model year 2005-07 Chevrolet Trailblazer, GMC Envoy, Buick Rainier, and Saab 9-7x vehicles.Of the 668 complaints, 58 incidents were alleged to result in a vehicle stall.Of the 58 stalling incidents, 43 complaints reported stalling because the fuel level reading indicated more fuel availability than what is actually in the fuel tank. One complaint alleged a vehicle crash after the vehicle stalled while exiting the interstate, became disabled, and was struck from behind.Summarily, the complaints show an apparent increasing trend, with most complaints received within the past year.A Preliminary Evaluation has been opened to assess the scope, frequency and potential safety consequences associated with the alleged defect.