GMC Yukon XL water leak problems

Filed Nov 3, 2026 · Body · MN

There is a KNOWN Issue with 2021-2025 GMC Yukon models with water leaking into the cabin from the sunroof or roof area. Online forums are inundated with customers of these vehicles complaining about the same issue. GM has also sent a Service Bulletin out regarding Kinked Sunroof Drains but it's also a poor decision where the Welds - or lack of welds - connect the cabin to the roof. It's beyond wild that this isn't a recall yet. GM Knows they skipped a step in their QAQC and are left with a HUGE problem they're unwilling to fix. Water - while driving or stationary - is entering the cabin and not cleanly exiting out down through the drains via their sunroofs. I was driving and could barely see because water was dripping on my feet as well down through the ceiling by my windshield. How many people need to submit a complaint before this actually gets looked at. DO NOT let the mechanics "air-blow" out the drain hoses. GM's service bulletin states these drain hoses can be kinked if so. This issue is scary and could be deadly. The weld across the roof wasn't done properly (as well, kinked drain hoses) and now people all over America have expensive vehicles with water leaking through their cabin liners into their vehicles. The damage over time will cost all of us injuries and money. This is a serious issue that's NOT getting looked at. Please realize the amount of people who are dealing with this and hold GM accountable.

Filed Jan 21, 2026 · Body, Electrical · IA

There have been several issues for which I had to take my vehicle to the dealer. I did the engine oil recall. Then 4 months later my engine was destroyed. I’ve had several issues with oil leaks. I had an issue with my running boards a few times. And I’ve had an ongoing issue that the dealer hasn’t been able to fix - a water leak (I believe stemming from the moonroof), water gets into my vehicle, on my floorboard, and behind the dash. I’ve called to record these incidents with the dealer and taken it in several times, but they are never able to duplicate it, but they have witnessed the water leakage after the incidents (which happens during heavy downpours, and isn’t all the time because my vehicle is in the garage when I’m not at work).

Filed May 17, 2024 · Body, Electrical · 55,000 miles · CA

The contact owns a 2021 GMC Yukon Denali XL. The contact stated that during rainy weather, rainwater leaked into the vehicle through the drainage hose, causing an electrical short. The vehicle was taken to a dealer where it was confirmed that the drainage hose and wiring needed to be replaced. The vehicle was repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 55,000.

Filed May 19, 2020 · Airbags, Body · 66,000 miles · NV

Tl* the contact owns a 2015 gmc yukon xl. The contact stated that water leaked into the roof of the vehicle and saturated the air bag and the main fuse box. The contact stated that there was a tsb for the failure. The vehicle was taken to reno buick gmc cadillac dealer, located at 900 kietzke lane, reno, nv 89502, (775)-815-7660, where it was stated that the failure was a factory defect. The technician reached out to the manufacturer and, the manufacturer agreed to cover ten percent of the repair cost. The vehicle was not repaired. The failure mileage was approximately 66,000.

Filed Feb 25, 2020 · 62,601 miles · SC

Water leaked into the vehicle's roof mounted antenna. This condition prevented the vehicle's onstar system from accurately determining the vehicle's location; disabled the vehicle's compass, navigation, and xm radio systems; illuminated the vehicle's red onstar indicator; and allowed water into the interior driver compartment. This condition occurred in both the stationary and in motion states. Gm issued product bulletin # 15155 for 2015 model year for the same issue, but did not correct for 2016 model year. Issue related to replacement of part # 23258460. This part was redesigned for 2017 model year to eliminate the design defect by relocating the moisture weep hole on the base gasket from the rear to the front to accommodate the roof slope.

Filed Feb 5, 2019 · Driver assistance, Lights · 78,000 miles · MI

This is the second complaint that I have made to the federal safety agency. The first time, the vehicle was spontaneously turning off and shutting down during backing in and turns causing a safety issue. This resulted in a recall, and a "software update" that was done twice to correct the issue. Right and back passenger lights began to blink on and off and water gets into the brake light. The dealer told me this was m issue. This time the 4wd service light came and the car appeared to be stuck in "4wd low" making it "drag" at a reduced speed when driving. Also, the "service trailer brake" light came on repeatedly. I have never used the trailer brake. I took it into an authorized dealer, sellers gmc in farmington hills, mi. They told me I needed a new "module", so I paid to have that done. Within one day the same service lights came on again. "service 4 wd" and "service trailer brake." I immediately took the vehicle back and am now being told it needs another software update and a new trailer brake transfer switch. Quite frankly, I believe that this model has significant, unaddressed computer software issues and the dealer does not know who to fix it. The car is unsafe because it spontaneously stops working appropriately during driving. The concerns have been various and always seem to affect steering, when turning or backing in. I am being charged for various control panels and modules. I am requesting that this concern gets addressed before there is a serious injury. I would like my vehicle fixed and returned to a safe condition. I was never told upon purchase, that this model would require so many "software" updates to remain safe. This should not be a burden placed on a consumer for a vehicle to operate safely. This is dangerous.

Filed Nov 14, 2018 · 43,700 miles · DE

As I was driving my vehicle yesterday after it was raining, the driver's side sun visor leaked water. I was told by my gmc dealership that the visor is leaking due to the antenna on the top of my vehicle. (I do not have a sun roof) so, my headliner is wet and the antenna needs to be replaced. I was told by my gmc dealership (I work for the family that owns the dealership) that the antenna is not covered under a recall. I do not think I should have to pay for a defect in my antenna! The manufacturer that made my vehicle should pay for the replacement of the antenna not me! It is not something that I have done to the vehicle. It is a defect in manufacturing! I would like for gm to place a recall for the antenna to be repaired free of charge. Again, I work with the gmc dealership and they have had other customers come in with the same complaint! Again, I should not have to pay for the replacement of the antenna or file a claim with my warranty company. This is a defect!

Filed Oct 9, 2018 · Body · 62,000 miles · TX

Tl* the contact owns a 2016 gmc yukon xl. While the contact's wife was driving 65 MPH, water leaked from the headliner console. The vehicle was not taken to a dealer to be diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 62,000.

Filed Mar 2, 2018 · Body · 40,200 miles · NC

High frequency antenna leaking water. This is preventing the vehicle's onstar system from accurately determining the vehicle's location; it has disabled vehicle's compass, navigation, and xm radio systems; the red onstar LED indicator has turned on ; and water is leaking into the interior passenger compartment. A recall was issued for the 2015 yukon xl for this same exact problem. However, I am having the same exact problem with my 2016 model. I have attached the recall issued for the 2015 models.

Filed Aug 5, 2004 · Electrical, Lights · 71,630 miles · SC

Whenever there is rain vehicle continuously leaks water onto the front floorboard, which shorts out the electrical system. Took the vehicle to the dealer for repairs. *ak the consumer was told that there was a defect in the firewall or a seal. Headlights short out while driving.