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ProblemsByVin File / 2018-CADILLAC-CT6
2018 · cadillac

cadillac CT6 problems

1 safety recall. 9 owner complaints. We mapped every trouble spot before you sign the papers.

0 5 10
Reliability score
8.8 / 10

Above-average reliability for the segment. Few systemic issues on file.

0
Critical
1
Severe
0
Moderate

Top trouble spots 2 categories with 3+ complaints

powertrain
3 reports · avg $2,500
moderate
steering
3 reports · avg $700
moderate

What owners are saying recent NHTSA-filed complaints · verbatim

2018 CT6 · powertrain
Front differential case ripped in half and separated from the ring gear. The broken chunk of differential case and pinion was still attached to the driveshaft while coming to an abrupt stop. Damage done within driveshaft tunnel. No warning, no vibration, no cause for concern,…
12/26/2025 · NHTSA ODI #11707182.0
2018 CT6 · steering
MY ENGINE LIGHT IS ON AND THIS IS THE 15TH TIME I HAVE BOUGHT MY CAR IN FOR VARIOUS ENGINE PROBLEMS LIKE ENGINE POWER REDUCED AND OTHER PROBLEMS WITH THIS CAR. THE CAR WOULD JUST STOP IN THE MIDDLE OF THE RIDE OR JERKING AS I DRIVE IT. I HAVE BEEN ON THE HIGHWAY WHEN IT HAS…
10/16/2020 · NHTSA ODI #11364614.0
2018 CT6 · powertrain
LOSS OF ALL VEHICLE POWER WHILE TRAVELING ON THE FREEWAY AT HIGHWAY SPEEDS. VEHICLE CHECK ENGINE, POWER LIMITED, AND ELECTRIC MOTOR OVERHEAT WARNING LIGHTS COME ON. THE COMBUSTION ENGINE WILL NOT START, AND BATTERY POWER AVAILABILITY GOES TO ZERO. THIS IS VERY DANGEROUS TO…
07/24/2020 · NHTSA ODI #11341298.0
2018 CT6 · electrical
RIGHT AFTER PURCHASE, THE NAV SCREEN KEPT FLICKERING, CAUSING A DISTRACTED DRIVER SITUATION AND A HAZARD. THE DEALER DID EVERYTHING THEY COULD PER GM GUIDELINES, BUT EVEN AFTER THE 1ST SERVICE VISIT, THE CAR WOULD SHUT DOWN IN DRIVE MODE, AS THE VEHICLE WAS IN MOTION. THEN THE…
05/30/2018 · NHTSA ODI #11098735.0

Estimate your repair exposure

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Active recalls showing 1 of 1

severe NHTSA 18V437000 28/06/2018

General Motors LLC (GM) is recalling certain 2016-2018 Cadillac CT6 vehicles

If the child seat cannot be attached correctly to the anchorage bar, there is an increased the risk of injury.

Fix: GM will notify owners, and dealers will inspect, remove any excess adhesive, and apply anti-corrosion primer to the inboard child seat anchorage bars, free of charge. The recall began August 3, 2018. Owners may contact Cadillac customer service at 1-800-458-8006. GM's number for this recall is 18228.

Common questions

Is the 2018 Cadillac CT6 reliable?

Mostly yes. With a reliability score of 8.8 out of 10 based on 9 owner complaints filed with NHTSA, the 2018 Cadillac CT6 is generally a sound vehicle. The areas to watch are listed in the top problem section above — most are budget items, not deal-breakers.

What's the most common problem on the 2018 Cadillac CT6?

Based on NHTSA records, the most-reported issue is powertrain, with 3 complaints filed. Average repair cost runs about $2,500 at an independent shop.

What's the most expensive thing that goes wrong?

The powertrain is one of the costlier repair items. Average repair cost runs about $2,500 at an independent shop. Catching early warning signs can sometimes extend life by 20–30,000 miles.

How do I check if my Cadillac CT6 has open recalls?

Paste your VIN into the decoder at the top of this page. We pull live from NHTSA, so you'll see exactly which campaigns apply to your vehicle and whether the dealer has logged the fix. Recall repairs are always free regardless of mileage or warranty status.

Is an extended warranty worth it on a 2018 Cadillac CT6?

Math is straightforward: a quality service contract runs $1,800–3,500 over 3 years. With 9 complaints on file and the costliest repair averaging $2,500, one major failure more than pays for it. The catch is reading the contract — many providers exclude wear items and require pre-authorization, so cheaper plans aren't always better value.

Related vehicles

Recall and complaint data sourced from the National Highway Traffic Safety Administration (NHTSA) public records database, last synced 15 hours ago. Editorial commentary written by ProblemsByVin contributors and reviewed by ASE-certified mechanics. We are not affiliated with cadillac. Some links on this page are affiliate links and we may earn a commission if you complete a quote or purchase.
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