This 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.
full bulletin at NHTSA ↗2020 Cadillac CT5 electrical problems
moderate 6 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Complaints
6
Recalls
0
Avg fix
$850
What stands out
Electrical accounts for 18% of all owner complaints filed against this vehicle, across 3 categories tracked.
No new NHTSA electrical complaint has been filed on this vehicle in over 5 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering electrical on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This 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.
full bulletin at NHTSA ↗The 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 diagnostic methods to identify them.
full bulletin at NHTSA ↗This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491, E4492, or E6961 and resolution information.
full bulletin at NHTSA ↗This 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.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 4 most recent
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…
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.…
CT5 2020 Doors will not unlock.
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…
Had electrical trouble with your 2020 Cadillac CT5?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the electrical problem on the 2020 Cadillac CT5?
It's a documented issue but not catastrophic. 6 complaints have been filed. Repairs average $850 and most owners catch it before it causes a breakdown.
At what mileage does the electrical typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $850 for electrical repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to electrical?
No active recalls currently cover electrical issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2020/Cadillac/CT5.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.