2020 Cadillac CT5 Electrical system Problems
- Complaints
- 8about this part
- Share
- 21%of 39 total for the year
- Median mileage
- 300miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 8 complaints about the electrical system of the 2020 Cadillac CT5, 21% of the 39 complaints for this model year. Where a mileage was given, the median is 300 miles. 1 of these say a crash was involved, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“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. …”
NHTSA complaint #11359880, filed 2020-09, 300 miles“The electronic exterior door handle on my CT5 has failed and raises a concern of what if there was an accident and nobody was able to open the door if I was unconscious. I believe that having a key access is not enough and there should be a mechanical exterior door handle instead of an electronic handle that fails and is costly to repair.”
NHTSA complaint #11712001, filed 2026-01“My front door latch doesn't work often leaving me locked out of the car. If the car is off I can use the auto roll down feature, but if the car is on i can't. This is a safety issue if I am in danger or my child is in the car.”
NHTSA complaint #11722816, filed 2026-03“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. …”
NHTSA complaint #11439475, filed 2021-11“The contact owns a 2020 Cadillac CT5. The contact stated that the check engine warning light was illuminated. The contact had noticed an oil leak and that the battery charge was abnormally low. The contact received an alert from OnStar pertaining to the critically low battery. Additionally, the contact noticed that there was an abnormal squishing sound coming from the dashboard, and the contact believed that the sound was coming from an animal that had intruded into the vehicle. The local dealer was contacted, but the vehicle was not diagnosed or repaired. …”
NHTSA complaint #11705360, filed 2025-12, 75,000 milesRelated service bulletins
- 11019017Apr 10, 2025This bulletin provides a procedure on how to check for a battery drain utilizing the Picoscope and how to measure the load on the system that may be causing a drain.
- 11017595Apr 3, 2025This service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use for certain repairs, such as Wiring Harness Repairs.
- 11017244Mar 31, 2025The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other…
- 11017207Mar 21, 2025This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414…
- 11017031Mar 12, 2025This service bulletin provides information to diagnose batteries that have set for a long period of time and/or cold weather climates and testing those batteries.
- 11015573Mar 5, 2025This service bulletin provides repair information to correct a customer concern of a loss of cabin heat.
- 11014230Jan 31, 2025This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
- 11014239Jan 29, 2025This service bulletin provides information on the Transport Mode Feature, also known as Logistics mode, which is used to increase the 12V Battery stand time of the vehicle during…
- 11014222Jan 28, 2025This service bulletin provides information to inform dealership personnel about Law Enforcement and Government vehicles that request to disable or enable content.
- 11013269Jan 16, 2025This informational bulletin provides a guide on how to diagnose and test for vibrations utilizing the PicoScope.
Electrical system: other model years
Other parts of the 2020 Cadillac CT5
15 complaintsOther or unknown
11 complaintsEngine
7 complaintsBody and structure
5 complaintsLatches, locks and linkages
2 complaintsSteering
2 complaintsVehicle speed control
2 complaintsWheels
2 complaintsAir bags
1 complaintsElectronic stability control
1 complaintsEngine cooling
1 complaintsFuel system
1 complaints
← All problems reported for the 2020 Cadillac CT5
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology