CADILLAC Complaints

Vehicle: 2026 Cadillac Optiq AWD Purchased/Leased: Beverly Hills Cadillac, XXX (new lease) Current Mileage: 2,313 (XXX) The vehicle's Automatic Emergency Braking (AEB) system has repeatedly activated without any actual hazard present, bringing the vehicle to a complete, unexpected stop while driving. This has occurred a handful of times with 3 notable occasions: XXX – On the [XXX], the vehicle applied full automatic braking and came to a complete stop with no vehicle or obstacle ahead of it. XXX – On a winding road, the vehicle again automatically applied the brakes and came to a complete stop with no hazard present. XXX – While approaching a stoplight under normal driving conditions, the AEB system engaged and stopped the vehicle unexpectedly. Each incident occurred without warning and without any legitimate collision-avoidance scenario (no pedestrian, vehicle, or obstacle in the vehicle's path). Sudden, unwarranted full stops — particularly on a freeway — create a serious rear-end collision risk to my vehicle and to other drivers. Dealer Response: I reported this issue to my local dealer. They confirmed there is currently no fix or software update available for this defect, as the defect seems to be a hardware issue across the model line. Their only recommended workaround is to manually disable all ADAS features that include automatic braking through the infotainment settings menu. However, these settings reset to their default "on" state every time the vehicle is restarted, meaning the defect cannot be permanently mitigated and reoccurs on every drive cycle. Safety Concern: This is a repeated, unpredictable, and un-fixable false-positive AEB activation that: Poses a collision risk to following traffic, especially at freeway speeds Cannot be permanently disabled by the owner Has no manufacturer-provided remedy at this time despite the dealer being made aware INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Engine knocking on cold start up. Second time hearing this. Loud “rattling” noise emanating from exhaust tips on rear of vehicle. I experienced this once before and notified my dealer. Additionally, at that time, I had a loss of power while towing a very, very, light empty trailer. The vehicle was struggling to maintain normal driving speeds and required considerable throttle input to do so. The loss of power was so pronounced that I actually pulled over to the side of the road in a parking lot to check to see if the wheel bearings had locked up on the small trailer I was towing. Of course, the trailer was completely normal and the hub temperatures were completely normal. I later found out about the GM L87 Engine issues and the recall issue. This vehicle then had the “pico“ test performed on it, and I was informed that it had passed. However, today I once again heard the same engine knock that I heard a few months ago.

Re: 2023 Cadillac Escalade 6.2L Engine Recall and Safety Concern. I followed the recall process, had the prescribed remedy performed, and yet the information now available has left me with substantially diminished confidence that the vehicle is protected against the very failure the recall was intended to address (catastrophic engine failure). My concern is reinforced by NHTSA's Engineering Analysis EA26005, which is examining post-remedy engine failures. When cold starting my Escalade, I hear clanging, flapping, and what I perceive to be abnormal noises coming from the engine. Combined with documented post remedy failures now being investigated by NHTSA, I do not believe the recall remedy provides a sufficient margin of safety.

The contact owns a 2025 Cadillac Lyriq. The contact stated that while driving approximately 45 MPH on a four-lane highway with the cruise control deactivated, the vehicle unintendedly accelerated. The contact stated that the vehicle accelerated above 100 MPH. During the failure, the cruise control erroneously activated but the speed was not displayed. The contact attempted to stop the vehicle by depressing the brake pedal but it accelerated instead. OnStar was contacted for assistance and moments later the vehicle decelerated and was driven to the shoulder. The contact stated that the vehicle travelled approximately 3 miles before the vehicle decelerated. The contact exited the vehicle, and there was smoke coming from the wheel wells and the brake pads. A tow truck was called to the scene, and the vehicle was towed to a local dealer. The cause of the failure was not yet determined. The manufacturer was notified of the failure. The failure mileage was 10,000.

The motor started making a ticking noise, then when we came to a stop, the motor died. I was able to get it started and get us home. As we made it home, the noise began to get worse. The next morning I planned to take it to the dealership. The car started and I began to drive. We entered the freeway and as traffic picked up, we came to a stop on the freeway. The engine died again. I was able to start it one more time and cotinued on until we got to the exit the dealership is on. At this point the car died again and we were unable to get it started. It left us stranded on the offramp. Car needed to be towed to dealership where it was discovered the engine had failed. Cadillac replaced the engine with a new one. This happened at 7100 miles.

6.2L Engine failed while over 400 miles from home. GM (Cadillac) has been zero help in rectifying the expense in travel interruption knowing this issue exists. Took almost 45 days for them to get vehicle repaired. Since repair I have had multiple other issues that I'm pretty sure is 100% related to this replacement.

Transmission control module went out of the blue, caused limp mode on the highway and barely got off. Damaged the Transmission, had to replace by cadillac. 2 weeks later after i got the car back, blew 3 fuses and the starter while driving. Had to get towed back over 100 miles. 3 days later the engine completely blew and they had to replace it. this was the second time this happened, first since ive owned it.

The contact owns a 2003 Cadillac Deville. The contact stated that the ignition switch seized. Occasionally, the contact was able to wiggle the switch for the ignition to operate. The contact stated that the ignition switch failed to turn or operate as needed. The vehicle was taken to an independent mechanic who was able to replace the ignition switch on three or four occasions. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The approximate failure mileage was 105,000.

1.) When traveling down a (4) lane back road (without a median or adequite shoulder) the engine of the vehicle suddenly stalled. I pulled over to the side of the road and went to restart the vehilcle and that is when I noticed a burning electrical smell. After that the vehicle was not responsive to any request. 2.) Sudden uncontrol failure of drive train/ vehicle propultion. Unable to move car to safe location. Stuck on side of (4) lane back road. 3.) The vehicle was taken to service and it was confirmed that the engine had seized. 4.) The dealership inspected the engine and noted the mechanical failure. 5.)No there were not and when accessing my "cadillac app" it noted the the vehicle was in good condtion and there were no problems to report. Notes: Vehicle was purchased with 71,642 miles on 2/28/2026 and failed on 3/8/2026 with 71,975 miles.

Vehicle was sent the dealership 4 times since 2024 for leaking oil. Was told it was a rear main seal each time. Dealership said they replaced it and 2 weeks later the vehicle leaks again. It is now at the dealership and they tell us the crankshaft failed.