Rear sliding window leaks

[Clg]

2015 Gmc Denali 2500 hd rear sliding window leaks inside ever time I wash my truck dealer says no fix and not to power wash window anybody else having these problems

[Clg]

Is there nobody else with this problem ?

[AK to WA]

I have experienced the same problem but only during washes in the touchless carwash. Haven't dug in to why or contacted the dealer as of yet. I'm sure it's just a design flaw on the 2015, right? Anyone having the same problem with the '16?

[Clg]

Yep mine is leaking in automatic car wash as well

Dealer says design flaw and nothing they can do so guess I'm going to have to deal with mold and mildew.

[austingta]

I use an automatic car wash all the time and have no leaks, so perhaps yours can be fixed.

[therink]

I have had no leaks with mine and wash it almost daily. One thing I did was spray some dry lube (silicone) on the window guides/seals as it appeared to bind slightly at times when opening closing. Not sure if this will help or not but lubing the seals might help by keeping them pliable.