2018 Chevrolet Sonic problems

Filed Oct 14, 2026 · Electrical · CA

My 2018 Chevrolet Sonic 1.8L has experienced repeated complete battery discharge and electrical failures over approximately two years. The factory infotainment system does not consistently shut down after the ignition is turned off. I must follow a specific shutdown procedure or occasionally remove the infotainment fuse to prevent battery drain. On October 10, 2026, after a three-day trip, the vehicle was completely dead. My 2,000-amp portable jump starter could not start it. Another running vehicle had to supply power before it would start. The vehicle then operated and restarted normally for approximately three days. On October 13, 2026, after several successful starts, I parked at 10 AM. By 4 PM, the vehicle produced rapid clicking sounds, then lost all electrical power. My jump starter again failed. Another person had to help push the car into the street and connect jumper cables to a running vehicle before it could start. AutoZone testing initially showed battery failure, but subsequent tests passed. The alternator and starter reportedly passed. I purchased a replacement battery on October 13 for approximately $135. The vehicle started normally afterward, but the underlying infotainment malfunction remains unresolved. GM Technical Service Bulletin 18-NA-048 documents unwanted radio activation and possible continuous parasitic battery drain in certain 2018 Chevrolet Sonic vehicles. The bulletin identifies a possible manufacturing-related cause. Whether this specific defect affects my vehicle has not been confirmed. I am a disabled woman with chronic illness and limited mobility. Being unexpectedly stranded creates serious safety risks because I cannot necessarily walk for assistance or tolerate prolonged exposure to extreme temperatures. I request that the federal safety agency investigate whether this is a broader safety-related electrical defect and determine whether a manufacturer safety recall is warranted.

Filed Jul 22, 2025 · Engine · IL

Dear GM Executive Office, I am writing in frustration and disappointment after being told today by Chevrolet Customer Assistance that the case I opened (Case # [XXX]) was simply a "dealer complaint" and that no further help would be offered - despite my vehicle exhibiting a recurring, safety-related malfunction covered under Special Coverage N232395330 - Turbocharger Replacement. To Whom It May Concern, I am writing to formally request a resolution regarding a recurring and unresolved issue with my son’s 2018 Chevrolet Sonic Premier (Turbocharged engine), VIN: [XXX] This past January we brought the vehicle to Ziegler Buick GMC of Lincolnwood an authorized due to overheating and a warning light. We paid $210 for a diagnosis and an additional $520 for a repair, totaling $730. The only action taken was the replacement of the coolant reservoir. The issue was not fully diagnosed, and the root cause was not addressed. On [XXX], the same issue has returned: Red heat warning light illuminated after less than one mile of driving. Coolant reservoir nearly empty upon inspection. Engine went into reduced power (“limp mode”). Scanner showed only a low coolant level but no additional actionable codes. Vehicle also displayed a change oil warning, likely triggered by overheating. This vehicle has a known history of turbocharger and coolant system defects, which have been acknowledged in GM technical service bulletins and Customer Satisfaction Programs. I have reason to believe this situation qualifies for one of those programs. Despite paying $730 for a prior repair, the vehicle is now exhibiting the same safety-related malfunction, putting my son at risk of engine damage and breakdown. We have also taken the car to Mike Anderson Chevrolet twice for inspection and they reported finding nothing. I am respectfully requesting the following: A thorough inspection and diagnosis of the entire cooling system and turbocharger INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOI

Filed May 15, 2025 · Engine, Fuel system · 85,000 miles · OH

The contact owns a 2018 Chevrolet Sonic. The contact stated that while driving at an undisclosed speed, the engine was idling roughly. The contact stated that the check engine warning light was illuminated. Additionally, the contact stated that the vehicle was consuming an excessive amount of fuel. The contact stated that the canister purge valve had previously been replaced, but the failure persisted. The vehicle was taken to an independent mechanic, who determined that the canister purge valve needed to be replaced a second time. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 85,000.

Filed Nov 6, 2022 · TX

My car has had CAM shaft issues upon buying the car. I have taken the car to Chevrolet in Dallas and in Forney, TX and the car still has the same issue. My car engine check light has remained on and consulting a personal mechanic, they informed me that this could be a recall issue and that I should report it.

Filed Jun 28, 2022 · Airbags · 15,000 miles · FL

The contact owns a 2018 Chevrolet Sonic. The contact stated that while a 95-pound passenger was seated in the front passenger’s seat, the air bag system was deactivated. The vehicle was taken to the local dealer who was unable to determine a failure and indicated no failure was found. The manufacturer was notified of the issue. The failure mileage was 15,000.

Filed Apr 30, 2022 · Electrical, Fuel system · MS

The has as well as mileage is not accurate and it constantly changes even while not driving which is adding more miles to car than actually is and you will never know how much gas you have in car truly which is safety concern especially if you are driving on interstate and can’t tell how much gas you have in car and suddenly run out of gas while other are behind you going 70 mph which can cause a wreck

Filed Oct 12, 2021 · Brakes, Engine · 28,000 miles · OH

The contact owns a 2018 Chevrolet Sonic. The contact stated that operating the vehicle, the front driver side seat would erroneously slide forward causing the driver's knees to make contact with the dash panel. In addition, while driving at various speeds the vehicle had suddenly stalled. The vehicle was taken to the local dealer who diagnosed that the electronic control unit hardware was faulty. Also, the emergency brake cable was hanging low to the ground under the vehicle. The vehicle was not repaired. The local dealer was notified of the failures. The manufacturer was not contacted. The failure mileage was 28,000.

Filed Mar 3, 2021 · Electrical, Wheels · 96,000 miles · FL

My radio turns off and on, on its own. Also when I have my bluetooth turned on for my phone, it gets stuck after I hang up the phone after a call. I was driving home from work on a state road. My right wheel bearing went out and I had to replace it last year.

Filed Sep 1, 2020 · Seat belts · 39,000 miles · AL

The passenger seat belt does not clip or will come undone at any given time. I made the dealership aware of the concern when the vehicle had approximately 39,000 miles. They stated that since it was out of warranty it did not qualify for production defect. This is a safety concern that could endanger the life of a person if west belt fails during a crash.

Filed Mar 5, 2020 · Electrical, Engine · FL

Today I'm writing in behalf of carite of oakland park I had a email chat with brian mccoy the branch owner of the company, I was told by him that the car was put in as repo status, due to me giving the car back. I feel my life was put in danger numerous of times and due to the negligence of the company I was not given a reliable vehicle nor was I treated as a valued customer... Good day, I've made all attempts regarding this situation with carite I'm the time allowed.. I'm requesting a full refund of my money I've made it clear and I don't want nothing else from these people at this company. I've told the owner not to have the car delivered on today 2/8/20 he still insist the driver greg to do so, I've rejected to receive the vehicle instead of honoring my request I'm getting phone calls from other parties at carite I guess to reconsider! No, I want my money my life will not be in danger due to they're negligence.. Thank you,the items submitted are receipts of payments also, the day of 1/20/20 I drove to fort lauderdale on the accept ion of getting the AC repaired and the windshield. Nothing took place for being there for 6 hours only to head back home exhausted�� and to finally get 50 miles home the car started to blow white exhaust from the vents, I immediately called carite and spoke with kim, who's in responsible for repair and maintenance. I told her what was going on and that I've had enough. I get home, wake up the next day to go to a dr appointment only for the car to not star! I lift the hood so my neighbor could give me a jump and this is what I find under the hood.. ( the pliers next to the battery that was left there and I drove home with it on the car that's alone it's enough puts my life in danger...