17 of the 293 complaints about the 2023 GMC Yukon XL are about the other systems — 6% of everything reported for this model year.
17
Complaints
0
Crashes
0
Fires
2
Injuries
Filed with NHTSA, in their own words.
UNKNOWN OR OTHER
Our lifters in cylinder 3 were replaced after failing at 40,000 miles. The exact same lifters broke again at 77,000 miles.both events caused engine failure.
NHTSA complaint #11757144 — an unverified report by a vehicle owner.
UNKNOWN OR OTHER
On a long trip the fuel tank straps and bolts holding the gas tank failed causing the fuel tank to fall and be dragged causing massive fuel spill. The problem has been confirmed by the dealer. The part was not inspected by police. However, we did get pictures of the tank at the scene. No warning lanmps or sfty signals were
NHTSA complaint #11752222 — an unverified report by a vehicle owner.
UNKNOWN OR OTHER
The panoramic sunroof on my 2023 GMC Yukon Denali Ultimate XL spontaneously exploded while driving westbound on I-20 on March 13. There was no impact from road debris, no vehicles ahead, no overpass, and no external cause. The failure sounded like an explosion or gunshot. Tempered glass shattered with the sunroof in the closed position, showering the interior with glass fragments. Five occupants were in the vehicle at the time. No injuries occurred, but the sudden explosive noise and shower of glass created an extreme distraction and safety hazard while operating the vehicle at highway speed. The incident could easily have caused a loss of vehicle control on the interstate. The component that failed is the factory-installed panoramic power sunroof glass, standard equipment on the Denali Ultimate trim. The vehicle was taken to Lugoff Chevrolet for inspection. The dealer confirmed the glass failure and submitted a request to GM for warranty or goodwill coverage. GM offered to cover only 10% of the repair cost, characterizing the failure as an out-of-warranty wear issue despite the spontaneous nature of the defect. There were no warning signs, cracks, chips, warning lamps, or any indication of a problem prior to the failure. The sunroof was closed at the time. The vehicle has been dealer-maintained with no modifications to the sunroof or roof structure. This is a known industry-wide defect. NHTSA has previously investigated spontaneous sunroof shattering and documented over 4,000 complaints. GM has acknowledged awareness of this issue in other GM vehicles and previously issued corrective actions for sunroof glass on the Buick Regal and Chevrolet Cruze. Other GMC Yukon owners have filed NHTSA complaints describing identical failures. The failed sunroof glass and vehicle are available for inspection upon request.
NHTSA complaint #11728231 — an unverified report by a vehicle owner.
UNKNOWN OR OTHER
The onstar module of my 2023 GMC Yukon has failed. This is a wide spread issue with recent model GMC's. There are thousands of reports of the same thing happenings. When an onstar module fails, the vehicle loses its safety features. No lane departure, no collision detection or pre-collision braking, no critical system checks. Even the gas and mileage components stop working correctly.
NHTSA complaint #11728073 — an unverified report by a vehicle owner.
UNKNOWN OR OTHER
POST-RECALL 25V274 ( & EA25007, EA25001) EXHAUST INTRUSION WITH CARBON MONOXIDE POISONING HAZARD Following the complete engine replacement under GM recall N252494000, my vehicle has developed a severe and persistent exhaust intrusion that allows toxic exhaust fumes, including carbon monoxide (CO), to enter the passenger cabin. CO levels have measured a peak of 83 PPM and consistent reading between 20-37 over multiple tests. PATTERN OF POST-RECALL EXHAUST SYSTEM FAILURES Vehicle has been in for service 6 times, over 100 days, as part of the engine replacement plus (metal found in the oil pan). Since recall, the vehicle has had an exhaust smell and noise rattle issue with the following exhaust system components deemed failed and been replaced: 1. Radiator cap (leaking onto exhaust) 2. Exhaust muffler (replaced TWICE - June 2025 and August 2025) 3. Exhaust clamps (leaking) 4. Left exhaust manifold (warped) Critical Finding: Despite replacement of virtually the entire exhaust system, the defect persists. This suggests a fundamental design or installation defect related to the engine replacement procedure, NOT isolated component failures. Documented Carbon Monoxide Levels: Between January 30 and February 3, 2026, I conducted 15+ tests using a professional-grade Klein Tools ET180 Carbon Monoxide Meter. Results: • Peak reading: 83 PPM • Multiple readings: 40-72 PPM sustained for 6+ minutes directly at my [XXX] daughter's car seat position • Testing method: Vehicle started via remote start, CO meter placed in cabin, readings recorded over 10-15 minute periods Health Impacts to Family: • Wife and [XXX] daughter consistently experience dizziness, headaches, and nausea when riding in vehicle • Daughter now refuses to ride in vehicle because it makes her feel sick • Symptoms consistent with carbon monoxide poisoning Independent service station verification on January 30th confirmed "vehicle is dangerous to operate with children inside and needs immediate service." INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMA
NHTSA complaint #11717379 — an unverified report by a vehicle owner.
UNKNOWN OR OTHER
Engine oil level drops significantly well before the oil change interval. Vehicle consumes excessive oil without warning lights or leaks. Risk of engine damage or failure if oil level is not closely monitored. Condition discovered during normal use.
NHTSA complaint #11707703 — an unverified report by a vehicle owner.
UNKNOWN OR OTHER
A recall notice was issued in April 2025. I have tried to get the recall issue fixed but my dealership has stated they cannot touch it yet as parts are not available. I have been told to continue driving my car and use only the oil as stated on the oil cap. My tab renewal notice has the recall listed, my GMC app shows the recall and NHTSA shows the recall. I have not been told when I can get my potentially faulty engine fixed or even looked at.
NHTSA complaint #11681355 — an unverified report by a vehicle owner.
UNKNOWN OR OTHER
While on vacation, 2023 gmc started making a very loud fan noise. Brought to two dealerships and displayed code for coolant flow control valve. We were told we can drive it home but to bring it to our dealership. Trying to drive home was a major safety concern. While on the highway our vehicle would suddenly lose speed and the engine would get quite loud. Causing us to pull over and wait…. With 5 kids. It’s been 6 weeks and no word when this will be fixed. All our summer plans are just being shot due to needing a large vehicle and our dealership said we cannot drive it.
NHTSA complaint #11669627 — an unverified report by a vehicle owner.
UNKNOWN OR OTHER
GMC Unable to remedy a recall that appears to be dangerous to operate without being addressed.recall number N25249000
NHTSA complaint #11669690 — an unverified report by a vehicle owner.
UNKNOWN OR OTHER
I own a 2023 GMC Yukon Denali XL (VIN: [XXX] ) currently under active recall for the L87 6.2L engine. GM has no remedy available and has acknowledged a risk of complete engine failure and loss of propulsion, which could occur without warning. This is the primary vehicle I have for transporting my family of seven, including a toddler. I am significantly upside down on the loan, and the dealership cannot guarantee it is safe to drive. I am requesting that NHTSA escalate the urgency and hold the manufacturer accountable for timely resolution or replacement.” INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11665392 — an unverified report by a vehicle owner.
UNKNOWN OR OTHER
Sunroof exploded
NHTSA complaint #11664268 — an unverified report by a vehicle owner.
UNKNOWN OR OTHER
Vehicle went to GM for recall repairs on 02/24/25 the morning after when I cranked my car it was dead. Jumped the car off then began hearing a "clicking noise" GM advised I replace my serpentine belt as they noticed it needed replacement when doing the recall repairs. 02/26/25 serpentine belt was replaced but car still seemed to have power issues when cranking. 02/27/25 car barely cranked then while driving down the highway I lost all power and power steering to the vehicle. There was no warning, no check engine lights etc. The screen went black then car shut off then the screen said "press start to restart." I was BARELY able to get the vehicle safely off the road with vehicles in front, behind, and in the other lanes. It could have caused a fatal accident. GMC still has my vehicle with NO UPDATE on replacement engine timeline.
NHTSA complaint #11654050 — an unverified report by a vehicle owner.
UNKNOWN OR OTHER
Engine had to be replaced at 25000 miles.
NHTSA complaint #11637903 — an unverified report by a vehicle owner.
UNKNOWN OR OTHER
During the operation of my 2023 GMC Yukon XL AT4 on [XXX], carbon monoxide (CO) entered the cabin, exposing my children and me to dangerously high levels of CO and causing confirmed carbon monoxide poisoning. We were driving with the engine running and the heater on for approximately 21 minutes when the exposure occurred. Symptoms began to escalate that day and into the proceeding days, including severe headache, stomachache, pallor, chest pressure, shortness of breath, fatigue, and neurological issues. My children, particularly my [XXX] and [XXX] , experienced the most severe effects— both were very ill especially my [XXX] . Unfortunately, we initially did not believe it was possible for CO to enter the vehicle cabin, which delayed early intervention and appropriate medical care. Blood testing 4 days later confirmed elevated carboxyhemoglobin levels in my [XXX] , the only one tested. During the incident, the battery warning light was the first indication of trouble, but soon after, many additional error messages began flashing on the dashboard. The vehicle then overheated, decelerated, and eventually shut down while driving. We were in the vehicle under 21 minutes. Upon inspection after the incident, my husband noted a severed belt and potential pulley issues. The exact cause of the CO intrusion has not yet been identified. The vehicle is available for inspection and unaltered to preserve evidence. I am writing GMC and requesting further investigation by GMC. This incident reflects a severe safety issue with potentially life-threatening implications for GMC owners. CO exposure can cause significant harm, and delayed identification in this case placed my family at substantial risk. Immediate investigation and corrective action are essential to prevent similar incidents from occurring in the future. Time is critical, as this defect could have catastrophic consequences for other unsuspecting drivers and their families. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11635465 — an unverified report by a vehicle owner.
UNKNOWN OR OTHER
Complete engine failure while operating the vehicle with our children riding along as passengers. The engine failure nearly caused us to wreck. 2023 GMC Yukon XL Denali with only 15,000 miles. And now, I am being told that I need a complete engine replacement and that GMC is well aware of these engine failures and the product defects, yet GMC has refused to issue a recall. To add insult to injury, I’m being told by dealership that it may take several months to get a new engine! We will be pursuing legal action.
NHTSA complaint #11620507 — an unverified report by a vehicle owner.
UNKNOWN OR OTHER
At approximately 9,000 miles the engine started knocking. I took it to the dealer today and they called to confirm the engine and radiator needed to be replaced as there are metal shavings in the oil. I'm not sure if it is the 6.2L engine lifter issue or if this is something different, nonetheless, engine issues for GMC seem to be systemic based on quick research and seeing posts in forums and social media.
NHTSA complaint #11606641 — an unverified report by a vehicle owner.
UNKNOWN OR OTHER
I was driving on Highway 78 from Alabama to Mississippi, when all of a sudden we heard a loud explosion type noise. My husband looked up at the panoramic sunroof, and there was a large hole, along with shattered glass. We looked in the SUV, and there were no objects to be found that could have broken the sunroof. It appears the sunroof spontaneously exploded.
NHTSA complaint #11542404 — an unverified report by a vehicle owner.