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I too have this make ans model which was also a returned lease with low miles and nearly new condition. I noticed a weird odor. Upon investigation I found almost 5 inches of water standing in the wheel well. My entire carpets were soaked. We took it to our Chevy dealer because of course I have a 6 yr bumper to bumper extended warranty. They claimed no knowledge of this problem in 2015. Of course the warranty does not cover leaks? WTF?? So they spent 3 hrs tore the entire back end apart, sealed some screw holes and rescrewed them. Well yesterday I looked because i never pt the carpet back and theres 2-3 more inches of water. I will go back as this is a defect and they will fix it under warranty as it appears to be a manufacturing issue. Glad I found your post!

T Graves
Good luck! Hope they do!
 

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I had the same problem with my 2014. I drilled a 1/4 inch hole in the floor of the trunk near the spare tire. No more water in the trunk.
 

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I had the same problem with my 2014. I drilled a 1/4 inch hole in the floor of the trunk near the spare tire. No more water in the trunk.
I guess if you are not under warranty and cannot afford the fix this is a reasonable solution but a hole could rust and when the water was coming into my trunk it was passing over a bunch of electrical connectors on it's way in.
 

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Another Swimming Pool in the Trunk

This past weekend I happened to grab something out of the trunk and I noticed it was damp. Oddly enough, I had just seen the issue discussed on this forum, so with dread I popped the cover to the spare tire area and yes, water in the well.

Fortunately, I caught it before mold set in, but this is ridiculous. Seals failing on a non-moving part in such a short period of time is clearly a design/manufacturing defect. Addressing it for the 2014, but not the 2015 when the same seals are used is clearly evidence that GM does not give a damn.

Up until last week, I loved this car. Could not rave enough about how GM got it right - a beautiful, comfortable and reliable car. NEXT DAY, check engine light is on with a "minor emissions leak". WTH - does everything break at once and is this ride just getting started?
 

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This past weekend I happened to grab something out of the trunk and I noticed it was damp. Oddly enough, I had just seen the issue discussed on this forum, so with dread I popped the cover to the spare tire area and yes, water in the well.

Fortunately, I caught it before mold set in, but this is ridiculous. Seals failing on a non-moving part in such a short period of time is clearly a design/manufacturing defect. Addressing it for the 2014, but not the 2015 when the same seals are used is clearly evidence that GM does not give a damn.

Up until last week, I loved this car. Could not rave enough about how GM got it right - a beautiful, comfortable and reliable car. NEXT DAY, check engine light is on with a "minor emissions leak". WTH - does everything break at once and is this ride just getting started?
I was in the same mindset. We found a used ltz and my wife and I were both happy with it. Beautiful car. Haven't even owned it a year and now things are starting to fail and I'm wondering if we made the right call. Evidently these new cars are not engineered to make it to 100k miles. I'll keep driving the car it replaced that used to be my wife's daily driver. Toyota Camry with 225k miles and no major maintenance except oil changes, brakes, and batteries.

When you make a car to last you build a customer base, when you build a car cheap to be expendable you lose long time GM owners like myself.
 

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My personal method of buying cars is to wait until many years after any major redeisgn - after it's been "refined" for many years.

For example, I didn't buy an 8th gen Impala until the 2012 MY (6 years after major redesign) - and I didn't buy a Dodge Challenger until the 2018 MY (10 years after major redesign). That is just the last two examples. I tend to do the same thing with engines - I tend to prefer "older" engines that have been around for a while and have a proven reliability record. Engines like the GM 3800, GM 3.6L and the Dodge 3.6L Pentastar.

I *did* buy a first model-year Buick LaCrosse - but that was only becuase it had the GM 3800 Series engine, which was a bulletproof engine. I did still suffer some other first-model-year issues with the car though - and was a good reminder not to do that again (although, overall it was still a very reliable car).

That being said, when you do this, you'll never have the "latest thing" - but you will have a reliable car. :)
 

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Hello All, I just purchased a used 2015 LTZ from a Chevy dealer. The car is in great shape and is in "like new condition". When I was purchasing the car I noticed that there was water in the spare tire well. I pointed this out to the dealer and he assured be that he would get it resolved. I left the car at the dealership a couple of days in order for the leak to be fixed and so it could be detailed and serviced (the car was just turned in on lease). I picked the car up and they told me that the leak had been found and resolved. They told me that the seal on the rear windshield had to be redone. I took the car home and have had it a almost two weeks. This weekend I was installing some sound deading mat in the trunk area hoping to reduce some of the rear road noise when I noticed that the carpet was wet on the drivers side. After reading through several post I see where this was a issue on 2014 gen 9's but I haven't seen where any 2015's were affected. This car has only been in the rain once since I have took ownership and the rain was not severe. I took advise from previous threads and closed the trunk and ran water down the back of the windshield, it appears that the water is coming in through the taillight gasket and making its way into the trunk area. I am planning on taking the car back to the dealership and have good faith that they will get it resolved. I would think that this car would have the new style taillight gaskets installed from the factory? Has anyone else had any issues with a 2015 gen 9 leaking in trunk? I always feel better walking into a situation knowing what what others have experience at least I can ask them did they check...... Thanks
My 2015 Impala has a water leak in the trunk which was just discovered. The water is coming in thru the taillight gasket the same as yours. I have been quoted $410 +tax to do the repair. I also paid $140 charge to find out where the leak was coming from. I bought the car new. You reported your leak on this forum in 2016 and my car would have been under warranty during this time. I'm not impressed.
 

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My 2015 Impala has a water leak in the trunk which was just discovered. The water is coming in thru the taillight gasket the same as yours. I have been quoted $410 +tax to do the repair. I also paid $140 charge to find out where the leak was coming from. I bought the car new. You reported your leak on this forum in 2016 and my car would have been under warranty during this time. I'm not impressed.
Here is information on how to fix the problem, if you want to repair the seals: https://static.nhtsa.gov/odi/tsbs/2014/SB-10092869-0335.pdf

There are YouTube videos on how to replace the seals, and partially remove the rear bumper fascia (cover).
 

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My 2015 Impala has a water leak in the trunk which was just discovered. The water is coming in thru the taillight gasket the same as yours. I have been quoted $410 +tax to do the repair. I also paid $140 charge to find out where the leak was coming from. I bought the car new. You reported your leak on this forum in 2016 and my car would have been under warranty during this time. I'm not impressed.



Chevrolet allows 1.3 hours of labor for replacement of the tail lamp gasket seals. The seals are about $10 - $15 each. If you were quoted $410 + tax to replace the seals, your dealer is gouging you. The dealer should also apply the $140 you paid to the repair. It takes about 5 minutes to determine the seals are leaking.
 
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