Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
40–25K
2625–50K
2550–75K
2375–100K
10100–150K
6150K+
94 reports with mileage · 26 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
Electrical System. Review the 87 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Exterior Lighting. Review the 17 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Fuel System, Gasoline. Review the 5 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
1 crash reports3 fire reports0 injury reports
What owners actually said
120 reports
124,000 miles · Aug 30, 2010
Electrical System
I OWN A 2005 CHEVY MONTE CARLO. LAST YEAR I NOTICED MY SPEEDOMETER AND RPM AND TEMP GAUGE STOPPED WORKING. I'VE BEEN SEARCHING FOR PLACES TO GET IT REPLACED AND IT JUST COSTS TOO MUCH AND WILL TAKE 3-5 DAYS FOR REPAIR AND I NEED MY CAR FOR WORK. I HAVE BEEN USING MY GPS TO SEE HOW FAST IM GOING. I ALSO LOOKED ONLINE AND HAVE SEE…
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I OWN A 2005 CHEVY MONTE CARLO. LAST YEAR I NOTICED MY SPEEDOMETER AND RPM AND TEMP GAUGE STOPPED WORKING. I'VE BEEN SEARCHING FOR PLACES TO GET IT REPLACED AND IT JUST COSTS TOO MUCH AND WILL TAKE 3-5 DAYS FOR REPAIR AND I NEED MY CAR FOR WORK. I HAVE BEEN USING MY GPS TO SEE HOW FAST IM GOING. I ALSO LOOKED ONLINE AND HAVE SEEN MANY COMPLAINTS FOR THE SAME PROBLEM. MY OIL GAUGE AND GAS GAUGE WORKS FINE. *TR
NHTSA ODI #10352870
75,000 miles · Aug 22, 2010
Electrical System
2005 CHEVY MONTE CARLO SPEEDOMETER, TACHOMETER. AND THERMOSTAT GAUGES DO NOT WORK. *TR
NHTSA ODI #10351164
58,000 miles · Aug 22, 2010
Electrical System
2005 MONTE CARLO SPEEDOMETER GAGE FAULTY READING INACCURATE OR FREEZES UNDERSTANDING THERE ARE NUMEROUS OTHER MONTE CARLO OWNERS WITH THE SAME PROBLEM AND ALSO WITH OTHER GAUGES. *TR
NHTSA ODI #10351121
87,000 miles · May 10, 2010
Electrical System
I HAVE A 2005 MONTE CARLO WITH ONLY 87,000 MILES. WHILE DRIVING ON THE HIGHWAY I WAS GOING APPROX. 55 MILES AN HOUR WHEN THE SPEEDOMETER STARTED SPEEDING UP SAYING I WAS GOING OVER 120. NOW THE SPEEDOMETER IS SAYING 120 MILES AN HOUR IN PARK. I HAVE CALLED THE CAR DEALERSHIP WHERE I BOUGHT THE CAR AND THEY TOLD ME THAT IT WOULD …
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I HAVE A 2005 MONTE CARLO WITH ONLY 87,000 MILES. WHILE DRIVING ON THE HIGHWAY I WAS GOING APPROX. 55 MILES AN HOUR WHEN THE SPEEDOMETER STARTED SPEEDING UP SAYING I WAS GOING OVER 120. NOW THE SPEEDOMETER IS SAYING 120 MILES AN HOUR IN PARK. I HAVE CALLED THE CAR DEALERSHIP WHERE I BOUGHT THE CAR AND THEY TOLD ME THAT IT WOULD BE OVER $500.00 TO FIX. I HAVE NOTICED THAT THIS IS HAPPENING ALOT ON THE 2005 MONTE CARLO'S. *TR
NHTSA ODI #10329525
74,000 miles · Apr 15, 2010
Electrical System
THE SPEEDOMETER AND TACHOMETER IN MY WIFE'S 2005 CHEVROLET MONTE CARLO STARTED SHOWING THE WRONG SPEED WHEN WE WERE DRIVING ON THE HIGHWAY. I SET THE CRUISE CONTROL AT 75, YET THE SPEEDOMETER SAID I WAS GOING OVER 100. AT FIRST THE PROBLEM WAS SPORADIC, THEN BECAME CONTINUOUS. I TOOK THE CAR TO A LOCAL DEALERSHIP AND HAD THE INS…
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THE SPEEDOMETER AND TACHOMETER IN MY WIFE'S 2005 CHEVROLET MONTE CARLO STARTED SHOWING THE WRONG SPEED WHEN WE WERE DRIVING ON THE HIGHWAY. I SET THE CRUISE CONTROL AT 75, YET THE SPEEDOMETER SAID I WAS GOING OVER 100. AT FIRST THE PROBLEM WAS SPORADIC, THEN BECAME CONTINUOUS. I TOOK THE CAR TO A LOCAL DEALERSHIP AND HAD THE INSTRUMENT CLUSTER REPLACED FOR ABOUT $460. WHEN I BOUGHT THE CAR, I ALSO PURCHASED AN EXTENDED WARRANTY, SO I HAD TO PAY $200 OF THE ORIGINAL BILL, HOWEVER THIS SEEMS TO BE A WELL-KNOWN PROBLEM OVER SEVERAL YEARS OF GM PRODUCTS. THERE HAD NOT BEEN ANY ACCIDENTS WHILE THIS WAS OUT, BUT MY DAUGHTER RECEIVED A SPEEDING TICKET AND I RECEIVED 2 WARNINGS FOR SPEED, ALL WHILE DRIVING IN TOWN. *TR
NHTSA ODI #10325859
60,000 miles · Mar 25, 2010
Electrical System
SPEEDOMETER ERRATIC AND INACCURATE SINCE EARLY 2009 WITH ABOUT 60,000 MILES ON THE ODOMETER. HAVEN'T BEEN ABLE TO TELL HOW FAST THE CAR IS GOING SINCE THEN. WHILE DRIVING SLOW ON RESIDENTIAL STREETS, THE SPEEDOMETER REGISTERS 120 MPH OR MORE. WHILE DRIVING HIGHWAY SPEED ON I-95, THE SPEEDOMETER SOMETIMES REGISTERS 20 MPH. TH…
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SPEEDOMETER ERRATIC AND INACCURATE SINCE EARLY 2009 WITH ABOUT 60,000 MILES ON THE ODOMETER. HAVEN'T BEEN ABLE TO TELL HOW FAST THE CAR IS GOING SINCE THEN. WHILE DRIVING SLOW ON RESIDENTIAL STREETS, THE SPEEDOMETER REGISTERS 120 MPH OR MORE. WHILE DRIVING HIGHWAY SPEED ON I-95, THE SPEEDOMETER SOMETIMES REGISTERS 20 MPH. THE TACHOMETER ALSO DOES NOT WORK PROPERLY AND THE GAS AND TEMPERATURE GUAGES ARE UNRELIABLE. UPON CHECKING THE INTERNET FOR SIMILAR PROBLEMS, FOUND THIS HAS BEEN A COMMON COMPLAINT WITH THE 2005 MONTE CARLO, AS WELL AS EARLIER MODEL GM VEHICLES. WHILE THE EARLIER MODELS HAVE BEEN RECALLED FOR THIS PROBLEM, THE 2005 MONTE CARLO HAS NOT. CURRENTLY WAITING FOR A RECALL ON THE 2005 MONTE CARLO, AS THIS IS A SAFETY CONCERN AND REPAIRS SHOULD BE COMPED BY GM. DEALER ESTIMATES REPAIR COST BETWEEN $600 AND $900. DAUGHTER RECEIVED A HIGHWAY SPEEDING TICKET IN FEBRUARY 2010 DUE TO INACCURATE SPEEDOMETER READING.
NHTSA ODI #10322130
Mileage unknown · Mar 2, 2010
Electrical System
INSTRUMENT PANEL CLUSTER FAILED ON A 2005 CHEVROLET MONTE CARLO. PANEL CLUSTER FAILED AROUND 42,000 MILES ON THE CAR. GAS GAUGE DOES NOT WORK NOR DOES THE SPEEDOMETER. OR TEMP GAUGE. THIS ISSUE IS COMPLAINED OF IN THE SAME YEAR VEHICLES. *TR
NHTSA ODI #10315790
60,834 miles · Mar 2, 2010
Electrical System
2005 CHEVROLET MONTE CARLO LS - SPEEDOMETER REGISTERED OVER 100 MPH WHILE DRIVING AT 55 MPH. ONCE PEGGED IT WOULD NOT RETURN TO ZERO, THE GAUGE REMAINED AT 50 - 60 MPH. WHILE RESEARCHING THE PROBLEM I FOUND THAT GM HAS HAD NUMEROUS PROBLEMS WITH VARIOUS MODEL CARS AND SUV SPEEDOMETER AND AT LEAST ONE CLASS ACTION SUIT WAS BROU…
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2005 CHEVROLET MONTE CARLO LS - SPEEDOMETER REGISTERED OVER 100 MPH WHILE DRIVING AT 55 MPH. ONCE PEGGED IT WOULD NOT RETURN TO ZERO, THE GAUGE REMAINED AT 50 - 60 MPH. WHILE RESEARCHING THE PROBLEM I FOUND THAT GM HAS HAD NUMEROUS PROBLEMS WITH VARIOUS MODEL CARS AND SUV SPEEDOMETER AND AT LEAST ONE CLASS ACTION SUIT WAS BROUGHT AGAINST THEM. *TR
NHTSA ODI #10315661
550,000 miles · Mar 2, 2010
Exterior Lighting
NO CRASHES BUT MY CHEVY MONTE CARLO 05 HAS A PROBLEM IT SEEMS LIKE THE HIGH BEAMS ARE ON A TIMER AND SHUT DOWN THE LIGHTS WHILE DRIVING. I KNOW OF ONE OTHER PERSON THAT HAD THIS PROBLEM. HOW MANY MORE ARE THERE? I WONT LET MY KIDS EVEN USE THE CAR AFTER DUSK. *TR
NHTSA ODI #10315604
46,730 miles · Mar 1, 2010
Electrical System
I WAS DRIVING MY 2005 MONTE CARLO AT NIGHT AND MY SPEEDOMETER AND TACHOMETER BEGAN TO OPERATE ERRATICALLY AND STOPPED WORKING. THE CAR HAD ABOUT 46,700 MILES ON IT WHEN THE MALFUNCTION OCCURRED. I REPORTED THIS TO THE CHEVROLET CUSTOMER SERVICE CENTER ON 3/1/10 AND THEY SAID IT WAS NOT COVERED. THE CSR ADMITTED THAT IT WAS UN…
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I WAS DRIVING MY 2005 MONTE CARLO AT NIGHT AND MY SPEEDOMETER AND TACHOMETER BEGAN TO OPERATE ERRATICALLY AND STOPPED WORKING. THE CAR HAD ABOUT 46,700 MILES ON IT WHEN THE MALFUNCTION OCCURRED. I REPORTED THIS TO THE CHEVROLET CUSTOMER SERVICE CENTER ON 3/1/10 AND THEY SAID IT WAS NOT COVERED. THE CSR ADMITTED THAT IT WAS UNSAFE TO OPERATE THE CAR WITH A FAULTY SPEEDOMETER BUT TOLD ME TO DRIVE IT TO THE CHEVROLET DEALERSHIP ANYWAY. (?) THE FAILURE OF GENERAL MOTORS DASHBOARD ELECTRONICS IS REPORTED EXTENSIVELY ON THE INTERNET. THERE ARE AT LEAST 57 COMPLAINTS ON THE NHTSA WEB SITE ABOUT THE SAME PROBLEM. GM AGREED TO PAY FOR TRUCKS AND SUVS FOR 2002 - 2004 MODEL YEARS BUT WILL NOT REPAIR ANY AUTOMOBILES. GM RECEIVED MILLIONS OF DOLLARS IN A SETTLEMENT FROM DELPHI ELECTRONICS FOR FAULTY PARTS IN A CLOSED SETTLEMENT. HOWEVER, GM WILL NOT CORRECT THE PROBLEM WITH THESE GAUGES. THIS APPEARS TO BE SIMILAR TO THE CURRENT TOYOTA FAILURE TO RESPOND TO THE FLOOR MAT FOOT PEDAL HAZARDS. PLEASE ADDRESS THIS PROBLEM BEFORE SOMEONE GETS SERIOUSLY INJURED OR KILLED BY OPERATING GM AUTOMOBILES WITH KNOWN OR POSSIBLE DEFECTIVE INSTRUMENT CLUSTER ELECTRONICS. RESPECTFULLY. *TR
This defect can affect the safe operation of the airbag system. Until this recall is performed, customers should remove all items from their key rings, leaving only the ignition key. The key fob (if applicable), should also be removed from the key ring. General Motors LLC (GM) notified the agency on July 3, 2014, that they are recalling 5,877,718 model year 2000-2005 Chevrolet Impala and Monte Carlo, 1997-2003 Chevrolet Malibu, 2004-2005 Malibu Classic, 1999-2004 Oldsmobile Alero, 1998-2002 Oldsmobile Intrigue, 1999-2005 Pontiac Grand Am and 2004-2008 Pontiac Grand Prix vehicles. In these models, the weight on the key ring and/or road conditions or some other jarring event may cause the ignition switch to move out of the run position, turning off the engine.
Consequence & remedy
Consequence: If the key is not in the run position, the air bags may not deploy if the vehicle is involved in a crash, increasing the risk of injury.
Remedy: GM will notify owners, and dealers will install two key rings and an insert in the key slot or a cover over the key head on all ignition keys, free of charge. The recall began on September 9, 2014. GM's number for this recall is 14350.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
0
No exact-year investigations in this snapshot.
2005 Chevrolet Monte Carlo Problems, Complaints & Recalls | Skip That Year