Buick Cascada Complaints

55 consumer complaints on file.

#11773949October 27, 2026
ENGINE
The contact owns a 2016 Buick Cascada. The contact stated that while driving at various speeds, the vehicle shuddered with an abnormal whistling sound coming from the vehicle. The vehicle was taken to a local independent mechanic, where it was diagnosed and determined that the PCV valve needed to be replaced. Two local dealers were contacted; however, the contact was informed that an unknown Buick Special warranty coverage had expired. The manufacturer was made aware of the failure by telephone. The failure mileage was approximately 38,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11773806October 26, 2026
FUEL/PROPULSION SYSTEM
Loss of power and humming noise from loose cam cover. (Buick Cascada 2016 and 2019 model years had recalls correcting this problem; but not 2017 or 2018 models. All years have the same engines. I think my vehicle should have been recalled.)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11765093September 17, 2026
ENGINE
After owning for a year, it started idling very rough. Took it to a shop and there was a GM Service Bulletin issued on these cars N192291620 that expired on 6/2026. They would not reimburse me as it expired and car was repaired by a third party. We had only put 500 miles on it since purchasing. It was the Valve Cover Gasket. As we are on a fixed income with a car under 50k miles, this was a big hit for us.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11748817July 7, 2026
ENGINE
Pcv failed causing rough idle, etc light and squeezing sound
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11748141July 3, 2026
ENGINE
A squealing sound was coming from the top of my engine and I had low/rough idle and it progressed to a low voltage output and check engine lights. This happened while i was driving on the highway and my speed was eratic and I had to cross 2 lanes to get the next exit. The problem has been reproduced my an indepent service center. The PCV vent constantly pulled vacuum (was stuck open to atmosphere) and the sound was only relieved by removing the dip stick. No warning lamps messages or symptoms. There is NO part number difference in the Camshaft cover between model years 2016 thru 2019 Cascadas. I believe that the 2018 should be included in the same Special coverage as the 2016 and 2019 model years. This issue has been noted in several Casada forums and is also the same as NHTSA complaint IDs: 11593462, 11587414, 11574318, 11515179.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11747657July 1, 2026
ENGINE
Vehicle is a 2018 requiring valve cover replacement due to an issue that was recalled on previous years, most recently 2016. Extended warranty was offered for these repairs. TSB Special Coverage N192291620 – Camshaft Cover Replacement (later superseded by N232395320). This should be reviewed for additional recalls.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11745874June 23, 2026
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV)
The contact owns a 2016 Buick Cascada. The contact stated that while driving at an undisclosed speed, the vehicle made an abnormal squealing sound. The vehicle was subsequently taken to the dealer, where it was diagnosed with a PCV valve failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 19,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11741220June 1, 2026
UNKNOWN OR OTHER
Rear convertible top window is separating from the convertible top from regular use and could detach and create a safety problem. This is a well known problem on these cars and Buick did not issue a recall and would not fix it. There was nothing in the owners manual about any preventative actions required.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11734656April 29, 2026
ENGINE
My Buick Cascada is a 2017 model and has 78,000 miles on it. There was a high pitched whistle/squeal type noise I was hearing and was told by the Buick dealership that it is an issue with the PCV valve failing. To replace this it will cost over $2,000 because of the design of where the valve is housed it is part of a much larger piece. In reading commentary on line i discovered that this is a known issue with the Cascada models from various years. Other year models have been granted an extended warranty to cover the repair. I feel that if it is an issue with multiple years then multiple years should be covered under the warranty. I was advised not to drive my car very far with the issue it has with the PCV valve and I rely on it to get to work every day which is an hour drive one way. I am now forced to give up my car or get it repaired and pay the ridiculous amount of money they are charging for a part that should be able to be replaced for much less had it not been part of the valve cover. Thank you
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11731096April 14, 2026
UNKNOWN OR OTHER, STRUCTURE:BODY
Buick Cascada back window on the convertible tops coming apart, causing flooding inside the car, also there's a danger the window will come out driving down the road. Buick refuses to do anything.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11728477April 1, 2026
ENGINE AND ENGINE COOLING
The contact owns a 2018 Buick Cascada. The contact stated that while operating the vehicle, the check engine warning light illuminated. The vehicle was taken to the local mechanic to be diagnosed, and it was determined that the air intake valve was faulty and needed to be replaced. The vehicle was not yet repaired. The local dealer was notified of the failure. The manufacturer was not yet contacted. The failure mileage was 72,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11724200March 13, 2026
VISIBILITY/WIPER
I am reporting the malfunction and separation of the rear window from the cover. This is a safety issue as there is the potential for it to come off while driving and possibly causing an accident. It started small, but has grown to almost 12 inches. I have not yet found anyone who has the capacity (or desire) to fix this. And those that actually want to take on such a project are charging over $5,000! Please help!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11718833February 18, 2026
STRUCTURE:BODY
The back window on the convertible top has separated from the fabric. Buick dealership said it was not a covered item under the extended warranty. We tried to glue it back down but it keeps separating all around. Dangerous situation because it could separate completely during travel and cause an accident/injury to others. Should be a recall item since it is being reported by several other Cascada owners.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11718797February 18, 2026
UNKNOWN OR OTHER, STRUCTURE:BODY
The rear window of the convertible top starts to pull away from the top itself. Could separate and displace entirely causing damage or injury behind.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11718080February 15, 2026
VISIBILITY/WIPER
The rear window of this car has separated and when I contacted the manufacturer they indicated a service bulletin was issued but they are not liable for the repair. The window has become more and more separated and I'm using glue to hold it on but it's becoming undrivable due to the risk of it separating while on the road. While this has not yet caused an accident, I believe this is one waiting to happen as many other owners of this vehicle are reporting the same issue. If this would fully separate while on a highway the consequences could be dangerous. This is a chronic manufacturing defect. Buick has indicated the repair would cost between $3,000 and $5,000, which is not possible.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11714025January 28, 2026
ENGINE
PCV Failure at 62,000 miles. GM extended warranty on 2016 models that demonstrated this problem. Appears to be a design flaw and often fails again after repair. $2000 + job to repair
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11705140December 15, 2025
ENGINE
I brought the 2017 Buick Cascada in for repair following rough idle and check engine light. This vehicle only has 46,200 miles. The mechanic put it to the computer and the mechanic found the issue that was ultimately identified as the camshaft cover/pc valve. This part was already replaced in my vehicle when the vehicle had roughly 21,000 miles. It has now broken again and it is a systemic issue with the Buick Cascada. On Google searches, I found similar issues were reported and GM extended the warranty on Buick Cascadas for different years. Both the 2016 and 2019 had a Global Warranty for PCV issues and Camshaft covers. "GLOBAL SAFETY FIELD INVESTIGATIONS [XXX] URGENT - DISTRIBUTE IMMEDIATELY Date: February 16, 2023 Subject: [XXX]- Special Coverage Camshaft Cover The mechanic stated, "the built-in PCV system has failed causing a vacuum issue within the engine and requires the entire camshaft cover to need replacement." It is important to note that General Motors produced this vehicle from 2016 to the 2019 model years and that during these years the camshaft cover/ pcv ( part number 25203562) remained the same and did not change , yet the coverage afforded above is only for the 2016 model year and the 2019 model year. The representative at General Motors confirmed that there is no difference in the processes or part or anything between the 2016 , 2017 , 2018 and 2019 Buick Cascada model years as it relates to the Camshaft cover/PCV and was at a lost to understand why two model years were covered and two model years were left out in the cold. It is a safety risk because the car cannot be driven with a broken camshaft cover/PCV.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11703205December 5, 2025
ENGINE, POWER TRAIN
The contact owns a 2019 Buick Cascada. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The vehicle lost motive power. In addition, the transmission and engine failure warning lights were illuminated. The vehicle was towed to the dealer, where it was diagnosed with turbocharger failure. The contact was informed that the turbocharger needed to be replaced. The vehicle was not repaired. The contact was informed that the parts were out of stock and on back order. The contact was informed that the repair was not covered under warranty, and the vehicle was 100 miles over the warranty limitation. The contact researched and stated that the failure was a known failure with the vehicle. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was 50,100.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698465November 9, 2025
ENGINE
Vehicle has rough idle upon start up and randomly rough idle/ acceleration. I have a p0-171 code that comes and goes, Mechanic I took to claims the PCV valve is located in side of the valve cover and feel is the culprit for the issues. Very high vacuum inside engine at this point. No whistling like some have mentioned but if you pull the oil fill or dipstick engine wants to quit and you can tell there is a large vacuum. This is a 2017 cascada and seems to align up with all of the issues that were noted in the complaints. Looking for an extended warranty to get this remedied. Thankyou for your time. current mileage is 90k miles
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11692340October 9, 2025
UNKNOWN OR OTHER
While driving down the highway my vehicle decreased in power and then I heard a loud whistle or whining sound. Upon examination at the dealership, they determined that the PCV system had failed. The positive crankcase ventilation system caused my Camm to leak and created a vacuum leak which blew out the seals of my vehicle. Upon further investigation I found that GM was involved in a class action lawsuit for the 2016 models and that an extended warranty was given for 2016 -2019 Cascada models. 15 years 150,000 miles. However, my vin and year was not included for the same problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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