2020 Cadillac CT5 Problems and Top Complaints – Is Your Car A Lemon?

Electronic stability control, build quality and engine issues among the top complaints received by the NHTSA from vehicle owners

Updated on Author: Brian Jones

Updated on Author: Brian Jones

Luxury sedans might not have as much popularity as they once did, but that hasn’t stopped the 2020 Cadillac CT5 from capturing some of the market share. This particular model is supposed to offer “unrivaled driving pleasure,” which is only partially true. It is unrivaled but doesn’t offer much pleasure due in part to the defective electronic stability control, malfunctioning engine and poorly-built structure.


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NHTSA Complaints for the 2020 Cadillac CT5

Complaint CategoryNumber of Complaints
Electrical System
Unknown Or Other
Air Bags
Lane Departure: Assist
Lane Departure: Warning
Vehicle Speed Control
Electronic Stability Control

Problems with the Electronic Stability Control

Owners should have no trouble keeping the CT5 on the road. After all, this expensive model should be equipped with top-notch controls that keep it in its lane. However, that’s not the case.

One NHTSA complaint states, “Vehicle displayed Service Driver Assist Warning which triggered Check Engine Light. Service Bulletin issues N202294740 to update software. Software updated and on way home, Service Driver Assist Warning came back on. Vehicle was in motion on the highway.”

Additionally, there are some steering concerns, which could make it even more difficult to control the Cadillac. Service Bulletin #N202294740 01 Pr states that software updates are also needed to address trouble with the steering feel and communication. If owners wanted to drive a clunker that doesn’t provide a luxury ride, they could save a lot of money with a Chevy instead

Problems with the Build Quality

Further evidence suggests that the CT5 is just a bucket of bolts, not carefully designed and put together.

One Cars.com customer review states, “Loud noises from the engine, cheap made dashboard, black out window on the side, cheap radio controls.”

It turns out that the major and minor details have all been overlooked when building this model. Even Service Bulletin #N202297690 suggests that the transmission mount snubber is out of position. If this occurs, owners might experience excessive noise and lots of vibration. These noises can serve as a constant reminder to owners about why they should never trust Cadillac manufacturing again. To overcome these noises, it might be best if drivers cranked up the radio and listened to the tunes instead.

Problems with the Engine

The most important part of any car is the engine, especially when paying a premium price. Yet, this is another component that gets a lot of criticism.

Here another Cars.com review. “I hate the stop and engine shuts off feature. It can be overridden but you have to do it every time you start the car. You get that feeling the car is ‘conking out.’”

Even Cadillac is acknowledging that the engine isn’t operating as it should. Service Bulletin #16NA383 states that the engine might suffer from a no-start, misfire or extended cranking situation. To correct this, Cadillac doesn’t look for a permanent solution. Instead, the automaker claims that owners should only use top tier fuels and a special fuel injection cleaner kit to keep the intake valves decarbonized. Leave it to Cadillac to put the problem back on the customer.

Your Lemon Law Legal Rights

Think you have a lemon? Sit back and let the experts work out your lemon case at no cost to you. The law makes Cadillac pay legal fees. You may be able to get your lemon out of your life. Every year, auto manufacturers buy back, replace or pay cash settlements to thousands of ‘lemon’ owners like you.

Complaint Data

CategoryAir Bags, Electrical System, Steering
DateNov 05, 2021
I have had many issues with onstar failing. I bought the 2020 cadillac ct5 awd 10/2020. It took onstar over a month to connect to my car to provide at&t internet plan (via onstar). On 4/22/21 I was hit in my driver front & wheel, onstar failed- never contacted us & the airbags did not deploy. I noticed my onstar light was red. Onstar was repaired during the body shop repair. Soon after I picked up the car (approximately 1 month) the srs light came on & onstar turned red again on 7/31/21. Dropped off the car to be repaired 8/13/21. After repair, srs light came on again on 8/29/21. Then 10/4/21 the entire cue system malfunctioned, could not use carplay, car internet would not work, & navigation would not load. 10/30/21 I cranked my car & left keys in car, the doors locked- which it should not have done. My onstar app could not unlock the car. I called onstar to unlock the vehicle & was told they were receiving a "busy signal, spinning sign" when trying to reach my car. My car finally shut off after idling for so long, and it unlocked the doors. I dropped off for service again 11/4/21. Gm & onstar both investigated car for the failures following the accident that occurred 4/22/21-both companies said no issue was found. Gm downloaded data from wreck data, I received the report and it was missing data.
CategoryElectrical System, Lane Departure: Assist, Lane Departure: Warning
DateAug 11, 2021
There are multiple issues with the electrical / electronics the dealer has never found any data in the systems that shows issues. Driver speedometer screen disappears and will be gone for hours or a trip. Restarting car does not fix. Center console screen that shows camera information disappears and you have no camera. Can be one or multiple trips and restarting car does not fix dealer says the previous two issues are known but no fix or recall has have been implemented as far as we are are aware. This has been a year approx. Drivers assist package threw the car into a curb creating minor damage to divers side wheels. Cadillac found no issues in recent service. When backing car up it has engaged the parking brake when driving the car it has shifted itself into neutral. The last 3 items the dealer spent weeks going thru the car with cadillac and found nothing. No parts have ever been replaced in multiple visits the last 3 are huge safety issues
CategoryElectrical System
DateDec 28, 2020
Tl* the contact owns a 2020 cadillac ct5. The contact stated while starting the vehicle, the service safety restraint system and air bag warning lights were illuminated. The vehicle was taken to the local dealer - dublin cadillac (4200 john monego ct, dublin, ca 94568: (925) 526-4384) and mataga buick gmc cadillac (3261 auto center cir, stockton, ca 95212, (209) 951-2600) however, the mechanics were unable to diagnose the failure. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 20.
CategoryElectrical System, Unknown Or Other, Vehicle Speed Control
DateSep 18, 2020
Purchased my 2020 ct5 in april 2020. Since then the vehicle has been at the dealership 5 times for the same service driver assist and forward collision system unavailable. Gm has dispatched a senior advisor to test the vehicle and even left a code reader in the vehicle to track its performance. Messages came on again. I recorded it as instructed and the device was sent back to the gm engineers. It has been over a month today 18 september and still no update as to what's wrong with this car. They've replaced and reinstalled cameras and devices and it still didn't fix the issue. I get a call today from the dealership saying the recall came out. I'm extremely frustrated and I know they still can't fix the issue after my car has been the first case and guinea pig of research. This has been going on since date of purchase. It's intermittent and at any time of day
CategorySteering, Suspension, Unknown Or Other
DateSep 14, 2020
When the vehicle is traveling over 50 mph, and takes sweeping turns / gradual bends on the highway, it becomes apparent that turning right is much harder than turning left. The steering wheel is much stiffer and feels heavier when making right turns at speed, almost like it's permanently stuck in sport mode when the wheel is turned right. It is constantly fighting to get back to center when taking those right turns at speed. Left turns are fine. On two occasions, the wheel suddenly and violently jerked left, trying to get back to center as I was in the middle of a turn/gradual bend on the highway. I almost crashed into the median, and the other two times, almost ran sideways into the cars to my left. The dealer "cannot duplicate" has not checked alignment, or taken other steps to investigate. I bought the car new, and have owned it for less than two weeks.
CategoryElectronic Stability Control
DateJun 23, 2020
Vehicle displayed service driver assist warning which triggered check engine light. Service bulletin issued n202294740 to update software. Software updated and on way home service driver assist warning came back on. Vehicle was in motion on the highway. *tr

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Brian Jones

About the Author:

Brian Jones spent more than 20 years working as an ASE Certified Master Tech and Parts Specialist at multiple dealerships. Brian has become an authority in the industry, traveling across the country to consult for car dealerships and contributing his expertise as a writer for several major automotive publications. In his spare time, Brian enjoys working on pickup trucks, muscle cars, Jeeps and anything related to motorsports.

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