2017 Chevrolet Impala engine problems

Filed Jul 21, 2025 · Engine · FL

I am writing to formally express my deep dissatisfaction regarding a recurring issue with my vehicle’s catalytic converter pipe. At 37,000 miles, the left-hand (front bank) catalytic converter pipe near the cylinder head mounting flange weld failed and was replaced under warranty by GM. Now, at just 88,000 miles, the same pipe has cracked again—at the identical location—and is not being covered by GM, forcing us to pay for repairs out of pocket. This is not simply a case of wear and tear. The failure not only resulted in significant performance issues, but also caused the housing of the fan to melt due to excessive heat exposure, posing a serious safety hazard. This repeated failure clearly indicates a design or manufacturing defect, and I’m appalled that GM has not acknowledged this as a broader issue—despite evidence suggesting this is a known and frequent problem with this vehicle model. In my view, the failure of the same part in the same location twice, within a relatively low mileage span, reflects an unacceptable lack of quality control. It is deeply disappointing that GM has not issued a recall or offered to cover this repair, which is demonstrably caused by the same flaw as before. This situation feels less like responsible customer support and more like an attempt to profit from known issues, leaving loyal customers to shoulder the financial burden. I am requesting immediate reassessment of this case, full coverage for this second repair, and a formal acknowledgment of this defect. I also encourage GM to investigate this issue further and consider issuing a recall to prevent others from experiencing similar damage and expenses.

Filed Feb 12, 2025 · Engine · TX

Catalytic converter cracked and is a huge problem with these cars

Filed Nov 10, 2022 · Engine · NC

2017 Chevy Impala 3.6L engine exhaust leak at the exhaust manifold / turbo charger. Resulting in exhaust fumes leaking driver/passenger area could cause fire and or damage to engine. Checking on the customer review and complaints page on the internet I have a lot of other complaints even to the point one persons wife developed lung cancer possible related to inhaling the exhaust according to her doctor. Who knows but I had a hard time getting my car to pass NC inspection because of the lake, please advise. As I am hard of hearing and didn't know I had this problem until the local NC Inspection station pointed it out all I knew was I could smell it or something. PS the email is that of my local mechanic, as I don't have one or how to even turn a computer on.

Filed Apr 5, 2022 · Engine · IL

Upon after starting the car a noise was coming from front of engine. I took a video and saw fire coming from the front left catalytic converter between the flange and the converter. The converter separated itself from the flange. The car, a 2017 has only 50000 miles on it always garaged and no accidents Luckily caught the converter problem before it completely blew itself off the flange and caused a fire.

Filed Jul 1, 2021 · Engine · 20,000 miles · TX

The contact owns a 2017 Chevrolet Impala. The contact stated while driving at an undisclosed speed, the vehicle lost motive power while depressing the accelerator pedal. The vehicle also failed to start intermittently. Neither the dealer nor manufacturer were made aware of the failure. The vehicle was not diagnosed nor repaired. The approximate failure mileage was 20,000.

Filed May 14, 2021 · Engine · TX · 1 injury

The contact's wife owns a 2017 chevrolet impala. The contact stated that while driving at various speeds, she would smell an abnormal, exhaust odor inside the vehicle's cabin without warning. The contact then stated that while driving at 50 MPH, he had heard a loud noise emit from the engine without warning. The contact then pulled off to the shoulder and upon inspection of the hood, the contact discovered the catalytic converter had broken off the engine. The contact was able to slowly drive the vehicle home and then called el dorado chevrolet(2300 n central expy, mckinney, tx 75070) where he was informed him that there were zero recalls on the vehicle; the contact was informed to bring in the vehicle for inspection. Upon investigation, the contact discovered a technical service bulletin the federal safety agency id number:10116660 which he linked to his failure. Recently, the contact's wife was diagnosed with lung cancer and the contact had linked the prolonged exposure to the exhaust odor as the possible cause of the diagnosis. The manufacturer was notified of the failure and offered no assistance. The vehicle had yet to be repaired. The failure mileage was unknown.

Filed Apr 20, 2021 · Engine · 49,000 miles · GA

Tl* the contact owns a 2017 chevrolet impala. The contact stated that hot air was blowing out the vents. There were no warning lights illuminated. The vehicle was taken to bellamy strickland chevrolet buick gmc (145 industrial blvd, mcdonough, ga 30253, (770) 954-3000) where the vehicle was diagnosed with an evaporator core leak. The vehicle was not repaired. The manufacturer was notified of the issue. The failure mileage was approximately 49,000.

Filed Dec 21, 2020 · Engine · 100,000 miles · IL

Brought my car in for routine oil change. Informed dealership of loud exhaust sound. Asked if they could check fo an exhaust leak. Upon picking up my vehicle I was informed the loud exhaust was due to a crack in the catalytic converter. I asked what would cause this to happen. They were unsure of cause it is not a normal issue for the mileage and age of vehicle. They did provide me with a quote to repair. I took my car to a different repair shop and they were concerned that this part was faulty from the manufacturer. They informed me that a recall could be possible and advised me to contact gm.

Filed Nov 9, 2020 · Engine · 65,000 miles · IL

Starting in march 2019 the 2017 chevy impala engine would stop and wouldn't start back up for at least 30 minutes. It would happen when I stop at a stop sign or light or whenever I stop the vehicle. Then in july of 2019 the vehicle stopped in the middle of the street. It wouldn't reverse or go forward. It was identified as a transmission leak. All the transmission oil had leaked out. Took the vehicle to several repair shops which they couldn't identify the problem. My transmission is damaged by now. A 2017 chevy impala should not have transmission problems unless there is some type of defect.

Filed Oct 11, 2020 · Electrical, Engine · 48,000 miles · MD

Once driven,car will not re-start. This will happen randomly . No clicking,no dash lights, absolutely nothing; as if no battery in car. Had it diagosed in shop twice now, can not find anything wrong (cannot duplicate no start). I noticed in car complaints .com that someone in horn lake, ms had smilar issue while driving on 3 different occasions. I believe this is a seriuos safety issue!!!!