Water sloshing sound in roof?

[B520044]

Every time it rains I get a loud sloshing sound in the roof. It sound like water is pooling up around the front of the sunroof and wind is blowing it around? Does this happen to everyone else? How can this be fixed? I've never experienced this with any other vehicle before. Could it be that drain plugs are clogged and the water is not draining properly?

We drove from Florida this weekend and I had to listen to this for 7 hours! It continues to make this sound hours after a rain. Has happened since it saw its first rain. Yet another strange annoyance of the new 2021 models.
Thanks,

 

[exp500]

At least it didn't slosh all over you! Warranty fix.

 

[BourbonNcigars]

Please keep everyone here updated on this since you're driving a '21. Pretty unacceptable, assuming there's a problem and you didn't just duck tape a drink to the roof.

 

[B520044]

*trying to upload a video*

 

[Tonyrodz]

*trying to upload a video*

Upload it to youtube then post the link.

 

[tpgunn]

2015 Tahoe, 2017 Suburban, and 2019 Suburban I could hear the water draining around the sunroof.... 250K+ miles....they exhibited the same sound when it rained. Ordering a 2021 Yukon this time.

 

[SnowBuck]

Yet another strange annoyance of the new 2021 models.Thanks,

Wow...between this and the other 2021 thread where it won't go into N...made me rethink buying a 2021!

 

[kidtriton]

My 2021 Yukon Denali does this, it actually sounds like a pop or clicking or slurping sound when you drive over 40mph after it's rained until all the water is gone. It sounds to me like when you are drinking a drink with a straw and it's almost gone.

 

[tpgunn]

Wow...between this and the other 2021 thread where it won't go into N...made me rethink buying a 2021!

If it is any consolation, I have spent 250k+ miles in these vehicles and have yet another one on order with the plan to put another 100K on one. If you have the radio on, you probably wouldn't notice it at all the majority of the time. Tires and brakes and these things just run forever. I have zero worries about ordering a 2021.

 

[Rocket Man]

You know what they say- never buy the first production year. There’s a few things that the 2021’s are suffering from, add this to the list. Hopefully GM will get these issues figured out by the next model year. Until then, a few visits to the dealer will be in order.

 

[B520044]

If it is any consolation, I have spent 250k+ miles in these vehicles and have yet another one on order with the plan to put another 100K on one. If you have the radio on, you probably wouldn't notice it at all the majority of the time. Tires and brakes and these things just run forever. I have zero worries about ordering a 2021.

It is quite loud and "kidtriton's" description is very similar. I wish I could ignore all the sounds and hate having to turn up the radio in order to drown out noises. The headliner creaks, the driver door trim creaks and now these water sounds.... I still love it, but noises have always been a pet peeve of mine. I want to keep it long term, but am worried the sounds will eat at me...

Just hope the dealer can do something. I opened the pano roof going down the interstate and the water sounds were still there.

Video link to sounds:

 

[Tonyrodz]

It is quite loud and "kidtriton's" description is very similar. I wish I could ignore all the sounds and hate having to turn up the radio in order to drown out noises. The headliner creaks, the driver door trim creaks and now these water sounds.... I still love it, but noises have always been a pet peeve of mine. I want to keep it long term, but am worried the sounds will eat at me...

Just hope the dealer can do something. I opened the pano roof going down the interstate and the water sounds were still there.

Video link to sounds:

Doesn't sound like water to me.

 

[Rocket Man]

Doesn't sound like water to me.

Yeah, I can hear some tapping noises but no water.

 

[B520044]

Yeah, I can hear some tapping noises but no water.

I agree the video doesn't sound so much like water, but it's water. Only happens during and after rain. I was driving 74mph, so the wind was really kicking the water around. My sunroof seal looks fine, so I don't know where the wind is getting in to move pooling water?

 

[Rocket Man]

I agree the video doesn't sound so much like water, but it's water. Only happens during and after rain. I was driving 74mph, so the wind was really kicking the water around. My sunroof seal looks fine, so I don't know where the wind is getting in to move pooling water?

Maybe coming up through the drain. Could be instead of draining water out, air is being pushed up.

 

[Toasty]

it almost sounds like the drain is catching the wind and pushing the water.

 

[B520044]

it almost sounds like the drain is catching the wind and pushing the water.

I think you guys are on the something here.

Does anyone know where the drain lines run? I have a service appointment (3rd since August) for this, oil change, and creaking sounds on the 24th. I'll mention this to them.

Thanks!

 

[kidtriton]

Yes, that's exactly how mine sounds. His video makes it sound a little less like water but that's what it is. I also concur that it's like there is water in the drain tubes and the air is blowing bubbles through it or something like that. I worked as a master Ford tech from 1993-2003 and did my fair share of sunroof work and it definitely sounds like something with the drain tubes. Having the experience that I have with vehicles and early model year problems I'm choosing to sit quiet with my few annoyances until there are tried and true fixes, I don't want to take it to the dealership for them to undo trim and the headliner not knowing what the end game is.

 

[Rocket Man]

Yes, that's exactly how mine sounds. His video makes it sound a little less like water but that's what it is. I also concur that it's like there is water in the drain tubes and the air is blowing bubbles through it or something like that. I worked as a master Ford tech from 1993-2003 and did my fair share of sunroof work and it definitely sounds like something with the drain tubes. Having the experience that I have with vehicles and early model year problems I'm choosing to sit quiet with my few annoyances until there are tried and true fixes, I don't want to take it to the dealership for them to undo trim and the headliner not knowing what the end game is.

From what I hear the dealers are breaking as many things as they’re fixing right now until they get experience disassembling the interiors. Good call.

 

[Rocket Man]

I think you guys are on the something here.

Does anyone know where the drain lines run? I have a service appointment (3rd since August) for this, oil change, and creaking sounds on the 24th. I'll mention this to them.

Thanks!

I doubt anyone but GM’s engineers know where the drain lines run but the dealership can probably break a few things looking for it.