Cadillac CTS transmission problems

POWER TRAIN

Engine burns 1quart of oil, 100 miles. Brakes went to floor, brake lines had holes at 69,000 miles. Driver rear axel leaks. 2006 Cadillac CTS is a lemon!! Money Pit !!!

NHTSA complaint #11741412 — an unverified report by a vehicle owner.

POWER TRAIN

Vehicle primarily failed while parked at owner residence [XXX] and remained inoperable for approximately three weeks prior to tow to Cadillac dealership. The ignition key became trapped and could not be removed. A manual override release beneath the driver-side steering column was required to free the key — confirming the lock was held electronically, not mechanically jammed. Fault confirmed by authorized Cadillac dealer: intermittent electrical fault within the shifter assembly lock mechanism. A similar intermittent concern was previously documented on this vehicle in 2011 (logged as "Customer Concern Not Duplicated"), establishing a recurring pattern. GM Technical Service Bulletin 07-07-30-032D (2006–2011 Cadillac CTS, automatic transmission) explicitly documents this exact condition: key sticking, Shift to Park DIC message, shifter binding, and battery drain. OEM replacement part is now discontinued. Manufacturer declined goodwill or recall coverage. Dealer refuses repair unless owner assumes full financial responsibility for a used part with no warranty and no guarantee against recurrence. Safety concern: ignition/shift interlock failure causing vehicle immobilization, key entrapment, and loss of transportation for an elderly owner dependent on the vehicle for medical care. Defect evades shop diagnosis due to intermittency. No safe OEM remedy exists. Prior recall: NHTSA 14V394000 / GM Campaign 14172 addressed same interlock system. Current failure represents recurrence beyond that recall's scope. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11737285 — an unverified report by a vehicle owner.

POWER TRAIN

On April 30,2026 I was pulling into a parking space and the gear shifter wouldn't go in to park with my foot the brake and the gear shifter wouldn't go in to park with my foot the brake and the gear shifter wouldn't go in to park . The tow truck driver who finally responded was able to lift the rear of the car up to see what was wrong with my car and I was placing it in the back of the he determined the cable for thre gear shifter was broken.

NHTSA complaint #11735366 — an unverified report by a vehicle owner.

POWER TRAIN

My 2014 Cadillac CTS has been making what sounded like road noise. After another person road in my car that was not in it daily like I was, they told me how loud it really was. After further investigation, my rear differential has gone out at only 80,000 miles. It’s impossible to drive due to the extreme safety concerns for not only myself but other drivers on the turnpikes and highways.

NHTSA complaint #11716449 — an unverified report by a vehicle owner.

POWER TRAIN

THE TRANSMISSION "SHUDDERS". It does not happen with any regularity and with no advance warning. It may be electronic or mechanical or both.

NHTSA complaint #11713692 — an unverified report by a vehicle owner.

POWER TRAIN

The contact owns a 2014 Cadillac CTS. The contact was informed of NHTSA Campaign Number: 20V038000 (Power Train). The vehicle was taken to a dealer; however, the vehicle was not diagnosed or repaired. The dealer informed the contact that the recall remedy could not be performed because the transmission and axle had failed and required repair and replacement. The vehicle was not repaired. The manufacturer was made aware of the issue. The failure mileage was unknown.

NHTSA complaint #11709498 — an unverified report by a vehicle owner.

POWER TRAIN

I am filing a complaint against Wagner Cadillac in Tyler, Texas, regarding mishandled recall service that resulted in severe damage to my 2014 Cadillac CTS Vsport (3.6 Twin-Turbo). Timeline of Events: Wagner Cadillac performed Recall #N192279370 (rear differential). At the time, only the differential code was present. Their own multipoint inspection showed no issues with the cooling or transmission systems. Immediately after recall service, my rear axle warning light came on for the first time. Shortly after, the transmission cooler line at the radiator burst, causing coolant and transmission fluid to mix. This led to overheating, hard shifting, and slipping. To limp the car home safely, I used a stop-leak additive only after the breakdown. The Magnuson-Moss Warranty Act clearly states warranty coverage cannot be denied unless the additive directly caused the failure, which it did not. The damage had already occurred from the ruptured line. When I returned the vehicle, Wagner Cadillac falsely accused me of voiding coverage due to the additive. They then refused to repair my transmission or cooling system, leaving me with a $30,000+ estimate. Why They Are Responsible: The problems began only after recall work. During service, Wagner Cadillac could have: Over-pressurized the system during testing. Improperly disturbed or reinstalled transmission cooler lines. Failed to secure or bleed the cooling system. Any of these actions could have caused the rupture. Their refusal to acknowledge this shifts unlawful blame onto me. Additional Concerns: Instead of helping me, Wagner Cadillac attempted to solicit me to sell them my broken car and buy another vehicle from them — both before and after they denied repairs. This is unethical and exploitative. Impact: I paid cash for this car not long ago. I have now lost reliable transportation, lost my job due to lack of mobility, and face financial INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11689733 — an unverified report by a vehicle owner.

POWER TRAIN

I purchased this vehicle is certified preowned Cadillac and during the warranty time I had a transmission issue that was causing the transmission to jerk when shifting from 1st to 2nd gear and at highway speeds, it would start jerking nonstop. I took it to the dealer and as per a service bulletin, they flushed the transmission fluid and replaced the transmission fluid. This was only a temporary fix because 30,000 miles later the same issues started occurring again and have gotten worse to the point that you can smell the transmission clutches burning and the transmission overheating, possibly causing the number four piston rings to come apart, resulting in an engine replacement as well. I’ve had to replace engine as possible result, but the transmission problem is still there and it has also caused the check engine light to come on intermediately. This could result in a complete transmission failure, causing a vehicle to lose propulsion leading to a possible accident and injuries. This issue needs to be investigated and repairs or replacement made at the manufacturers expense.. This is a four-cylinder turbo engine and an eight speed automatic transmission. In my opinion, the transmission issue caused my engine failure. There should be investigated and an immediate recall issued.

NHTSA complaint #11688656 — an unverified report by a vehicle owner.

POWER TRAIN

own a 2014 Cadillac CTS (VIN: [XXX] ) that was serviced under GM Recall N192279370 for rear axle differential seizing. On [XXX], the dealership replaced the rear differential carrier assembly and performed the required hydraulic system bleed. At intake, their own multi-point inspection documented no issues with the transmission, radiator, or cooling system. Immediately after the recall repair, my vehicle experienced severe issues: transmission slipping and radiator contamination with transmission fluid. These problems did not exist prior to the recall service. The dealership now claims the damage resulted from “stop leak” in the system and refuses warranty coverage. However, stop leak was not used until after the failure occurred, and only as an emergency measure to get the car home safely. The evidence strongly indicates that the failure resulted from the recall service, possibly from improper reconnection or contamination during the repair. Their refusal to acknowledge responsibility leaves me with significant repair costs for a problem that began directly after their mandated safety recall work. I am requesting NHTSA’s assistance in investigating this case, as the failure appears to be linked to the recall repair and raises concerns of improper procedures during service. Documentation, including service invoices, inspection sheets, and repair notes, are available to support this complaint. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11684317 — an unverified report by a vehicle owner.

POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT

The contact owns a 2015 Cadillac CTS. The contact stated while driving 65 MPH, the vehicle shuddered and made an abnormally loud sound. The contact exited the highway and drove to the nearest mechanic shop at a gas station. The mechanic diagnosed the vehicle and determined that the rear differential was fractured and needed to be replaced. The vehicle was being repaired. The contact related the failure to NHTSA Campaign Number: 20V038000 (Power Train); however, the VIN was not included in the recall. The dealer and the manufacturer were not notified of the failure. The failure mileage was approximately 98,000.

NHTSA complaint #11673962 — an unverified report by a vehicle owner.

POWER TRAIN

I began hearing a “hum” when driving my vehicle and dismissed it thinking it was the type of low profile, no flat tires. After a getting new tires, brakes, brake pads, and control arms, we still heard the “hum” and it continued to get louder. We took the car to 4 different places where they all stated the rear differential is the problem. I never had a service engine light come on. We found out that there was a recall on this part for other Cadillac CTS vehicles but my VIN did not come up as one that has a recall. I have had my rear differential fluid serviced and changed right before 30K miles. I now have a little over 95K miles and am told there is a back order for this part due to how many other Cadillac CTS vehicles are having the same issue. This could make car lock up at any time while driving. I transport my grandchildren and elderly Mother in this vehicle regularly. We have been told that it will take over $6K to fix and since the part is on back order, it will be several months before it can be fixed. This is not only a dangerous and possibly deadly circumstance, but extremely inconvenient and expensive. This part needs to be recalled for all Cadillac CTS vehicles and the parts need to be available as soon as possible.

NHTSA complaint #11672975 — an unverified report by a vehicle owner.

POWER TRAIN

Unknown I have been driving my car for 2 years now. For about the last year the steering in has been handling horrible and I have checked all parts every think is in good condition. I have read online it's a common problem and I see it as a safety concern especially since it's recalled on the same vehicle different vin. So when driving down the highway it's hard to stay centered and the car pulls different directions and the steering gets stiff to where it feels locked up. It is electrical power steering and I have experience from a prior experience with a 2009 pontiac g6. All these parts should of been recalled and not just a handful.

NHTSA complaint #11673062 — an unverified report by a vehicle owner.

POWER TRAIN

The gear shifter cable on my 2014 Cadillac CTS failed completely and without warning. The vehicle became totally inoperable and could not be shifted into Park, Neutral, Reverse, or Drive. There were no dashboard alerts or signs of failure. This matches the exact symptoms described in GM Recall No. 21V473000. However, my vehicle was excluded from further action because it had previously received a visual-only inspection during the recall window. No functional testing was performed. Despite being marked as “repaired,” the shifter cable failed exactly as described in the original recall. GM confirmed that the recall case was closed after a visual inspection per their protocol. But this inspection clearly failed to detect a dangerous mechanical defect. I have now been without a working vehicle for over two weeks, with the earliest dealership appointment not available until the week of July 7 — and a $180 diagnostic fee quoted, with no guarantee of repair coverage. This breakdown could have resulted in a crash or rollaway if it had occurred while driving or parked on an incline. It poses a serious safety risk not just to me but to the public. Vehicles cleared with insufficient inspection should not be excluded from protection. I respectfully request that NHTSA investigate this failure, hold GM accountable for prematurely closed recall cases, and consider requiring them to reopen and expand the campaign to include VINs like mine. I am willing to provide photos, documentation, and records as needed. Thank you for your attention and swift consideration.

NHTSA complaint #11670528 — an unverified report by a vehicle owner.

POWER TRAIN

The contact owns a 2014 Cadillac CTS. The contact stated that while driving 60 MPH, the contact heard an extremely loud bang, after which the vehicle lost motive power. The contact was able to pull to the shoulder of the roadway and observed smoke coming from the rear axle. No warning lights were illuminated. The vehicle was towed to an independent mechanic, who diagnosed a failure with the rear axle differential. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 20V038000 (Power Train); however, the VIN was not included. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 170,000.

NHTSA complaint #11663372 — an unverified report by a vehicle owner.

POWER TRAIN

I believe it’s the transmission it’s not changing gears like it supposed to only have 52,000 miles on the dash. It’s have to be defective. No Incident

NHTSA complaint #11658018 — an unverified report by a vehicle owner.

POWER TRAIN

driving to work on very busy highway. The engine light and Service Battery charging system came on, then went to battery saver almost instantly. Radio cut off, heat cutt off and the Car cut off in the middle of the highway before I could safely get over. this caused me to fear for my life as the cars behind me barely had time to stop. a hair probably could not have fit between us. I did eventually safely get off the highway, had the car towed to a service center. There was 14 different codes.(low voltage, engine running lean, low voltage and more. battery was checked and was 95 %, Alternator fine. was told it was the ECM. After looking on google some sites say there is a recall for 2013 cts some say there is not. there are multiple complaints on this issue and it is not safe. I called Cadillac gave my vin number and was told there was not a recall. Cadillac/GMC really need to issue a recall before something tragic happens, as it almost was me. Thank God that it wasn't.

NHTSA complaint #11645666 — an unverified report by a vehicle owner.

POWER TRAIN

The rear differential started making noise and growling. Upon draining the differential, we found a lot of metal debris. Upon reading on this issue, we found that Cadillac has had this issue with past models. It seems that the original G.M. part is no longer available. This could be a safety risk if the rear wheels are to lock up due to debris. It has not been confirmed by the dealer, the vehicle is out of warrantee at 91,000 miles.

NHTSA complaint #11625811 — an unverified report by a vehicle owner.

POWER TRAIN

The contact owns a 2014 Cadillac CTS A. The contact stated while driving at approximately 45 MPH she heard an abnormal sound from the rear of the vehicle. The contact stated that it sounded like an amplified road noise. Additionally, the contact stated that there was an intermittent sharp jarring of the vehicle. The contact stated that the vehicle was downshifting to a lower gear independently. The contact stated no warning light was illuminated. The contact had taken the vehicle to an independent mechanic who had diagnosed and determined that the differential was cracked and needed to be replaced. The vehicle was not repaired. The contact had researched online and related the failure to NHTSA Campaign Number: 20V038000 (Power Train). The manufacturer was informed of the failure. The failure mileage was approximately 70,000.

NHTSA complaint #11620123 — an unverified report by a vehicle owner.

POWER TRAIN

Rear differential failed on a vehicle with 60,000 miles and required a $4,200 repair. The manufacturer warranty covers up to 70,000 miles, but the age of the vehicle voided the warranty. Five Year manufacturer warranty and the vehicle is 7 years old, but within the mileage. Without the repair the vehicle is worthless, whereas it is worth @$14,000 {Kelly Blue Book}. Checked online and it is not uncommon for this model and the newer CT-5/6 models to have this issue.

NHTSA complaint #11619823 — an unverified report by a vehicle owner.

POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT

The contact owns a 2015 Cadillac CTS. The contact stated that there was an abnormal loud clunking sound coming from the rear end of the vehicle while the vehicle was shifting into gears. The vehicle was taken to AMCO Transmissions & Total Car Care, where it was diagnosed that the rear differential had failed and needed to be replaced. The contact stated that the vehicle was previously serviced under the NHTSA Campaign Number: 20V038000(Power Train); however, the failure persisted. The vehicle was not repaired. The local dealer and the manufacturer were notified of the failure. The failure mileage was 125,000.

NHTSA complaint #11618015 — an unverified report by a vehicle owner.