Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2005 Chevrolet Monte Carlo owners, lightly cleaned up (personal details are redacted by NHTSA).
Key fob quit working. I use the key to manually unlock car. However, after car is parked and off, the doors lock and unlock themselves. The front and rear lights flash while doors locking and unlocking. The other night, it was flashing morse code for over 24hours. I do not have on star connected. Horn quit working 4 months right before key fob quit. I can't use my bright lights, because I lose dash lights, head lights. My son and I share this car to drive to work. Since the lights started flashing all day and night, I felt it is unsafe for him to drive to work which is 40 miles one way. Why so many issues that are not being taken serious? I drive my car during day time. I pray I make it to work. I have to drive 9 miles one way to work. However, I drive highway 75 with semi trucks going 70 miles an hour. If this car loses power on that highway, I will probably not survive. …
I took the car to a Chevy dealer for the ignition switch recall dated July 3 2014.I told them about problems with the ignition switch such as the key can be pulled out when car is running and sometimes the starter stays on with engine running also problems turning the key.I waited while they did the recall service.when they were done they told me they put a plastic cover on the key.I started the car and found the problems were still there.I told them the recall was for a ignition switch not ignition key and their fix did nothing to fix the problem.they told me this fix is all they can do.a few weeks later,I could not get the car to shut off.I had to force the ignition off using a screwdriver and I had to buy a new ignition switch and install it myself however I will have to go to a locksmith so he could make the new key work on my door.150.00 foa a switch.still have to pay a locksmith.I …
Tl* the contact owns a 2005 Chevrolet Monte Carlo. The contact stated that the vehicle was taken to the dealer to complete the repair for NHTSA campaign number: 14V400000 (electrical system). A few days after the recall repair was performed, the pass key lock sensor illuminated. The dealer stated that the ignition switch needed to be replaced. The dealer stated that the magnet connection was not communicating with the key. The manufacturer was notified of the failure and provided no remedy. The approximate failure mileage was 80,052.
Tl* the contact owns a 2005 Chevrolet Monte Carlo. The contact stated that the front driver's side seat warmer was activated when the seat caught fire. The contact shut off the driver's side seat warmer. No one was injured during the fire. The fire department was not called. The contact took the vehicle to a dealer for a diagnostic testing where the dealer advised that a short in the driver's side seat warmer caused the fire. The dealer did not perform any repairs to the vehicle. The failure mileage was 75,000.
Tl* the contact owns a 2005 Chevrolet Monte Carlo. While attempting to start the vehicle, the ignition failed to start without warning. The contact stated that the transmission was replaced. The vehicle was taken to a dealer where it was diagnosed that the body control module failed and needed to be replaced. The vehicle was repaired, but the failure was persistent. The manufacturer was notified of the failure. The failure mileage was approximately 80,000.
Tl* the contact owns a 2005 Chevrolet Monte Carlo. The contact stated that the sun roof connector plugs, which were connected to the motor, melted and produced smoke. Additionally, the interior lights, instrument panel lights, and the lighting for some of the radio components failed. The vehicle was taken to a dealer, but was not diagnosed. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 205,000.
Tl* the contact owns a 2005 Chevrolet Monte Carlo. The contact received notice of NHTSA campaign number: 14V400000 (electrical system). The contact stated that the air bag, brakes, battery and check engine warning lights illuminated while the vehicle stalled. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failures. The failure mileage was 166,000.
When I first bought this car the boost gage was not working. A few days later the gas oil pressure and temperature gauges started going crazy. The temperature gauge needs to work to show overheating of engine to avoid damage. Internet forums say this issue a very common issue. Picture shows gauges on left after car running 10 min with approx half tank of gas
Tl* the contact owns a 2005 Chevrolet Monte Carlo. While driving at various speeds, the speedometer and fuel gauges became inoperable. The failure recurred randomly. The vehicle was not diagnosed nor repaired. The manufacturer was not notified of the failure. The failure mileage was 80,000.
Speedometer going nuts. Stuck on 85mph while idle and off as well. Periodically, the trac and ABS lights will come on. When backing up and put in drive to go, the traction active light comes on and car will lug and grind.
Related recalls
Electrical system › Ignition
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.
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.
Electrical complaints in other Monte Carlo years
Frequently asked questions
How common are electrical problems on the 2005 Chevrolet Monte Carlo?
NHTSA has 87 complaints about the electrical system of the 2005 Chevrolet Monte Carlo, 73% of the model year's 120 complaints. The component named most often is instrument cluster/panel (32 mentions).
Is there a recall for 2005 Chevrolet Monte Carlo electrical problems?
Yes — NHTSA recall 14V-400 (ignition, Jul 3, 2014). Recall repairs are free at authorized dealers.
At what mileage do 2005 Chevrolet Monte Carlo electrical problems start?
Half of the complaints with a recorded mileage happened before about 70,000 miles, and 6% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 3 fires and 0 injuries to electrical system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.