2014 LTZ rear window defroster shorted and shattered window. - Chevy Impala Forums
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post #1 of (permalink) Old 07-24-2019 Thread Starter
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Unhappy 2014 LTZ rear window defroster shorted and shattered window.

Driving to work this morning at 4:45am, on the interstate, no traffic around me and I heard this amazingly loud POP then what sounded like sand or gravel under the tires. I thought a tire had gone flat at first but quickly dismissed this thought as the car seemed to drive fine. I noticed in my rearview mirror that my rear window was very hazy and opaque looking.

Apparently my defrost had shorted in one small area and overheated causing the glass to shatter. I had the windows in the car tinted about 6 weeks ago and have used the rear defrost multiple times since then but this morning was the coolest it had been (63 degrees) since the tint job was done.

Not sure if this is the reason why this happened or if this is just a random event.

So my question to the forum is have any of you had this problem and/or anyone aware of a possible internal GM memo or directive documenting this sort of thing as an ongoing issue.

Thanks in advance!

BTW, In the photos you will see silver tape along the edge of the window. I did that after I got to work to help stabilize the window for the drive home (54 miles).
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post #2 of (permalink) Old 07-24-2019
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I own a 2014 Impala 2LTZ - no tinted window film.

Your vehicle insurance comprehensive (glass breakage) coverage should pay for the repair - minus any deductible. I would not put tint film on the new rear window glass.

I have never heard of this type of breakage - I would suspect that the film and/or installation had something to do with it.
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post #3 of (permalink) Old 07-25-2019
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I have never heard of this on any car and tint shouldn't bother it. There are tons of cars out there with tinted windows that have window defoggers on them.


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post #4 of (permalink) Old 07-25-2019 Thread Starter
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Originally Posted by impaler View Post
I have never heard of this on any car and tint shouldn't bother it. There are tons of cars out there with tinted windows that have window defoggers on them.
Impaler, you make a good point. I was thinking the same thing. I have owned several vehicles with rear window defrosters and have had the windows tinted and never had this problem.



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post #5 of (permalink) Old 07-25-2019
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I was surprised to find this is more common than expected. Search Google for "rear window glass shattered" or "rear window exploded."

Wikipedia has an article on spontaneous glass breakage:
https://en.wikipedia.org/wiki/Sponta...glass_breakage

Also happens with glass sunroofs. Yikes.

Causes of Sunroof Explosions:
https://info.glass.com/causes-sunroof-explosions/

Consumer Reports Exploding Sunroofs: Danger Overhead:
Exploding Sunroofs: Danger Overhead
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Last edited by Lettermark; 07-25-2019 at 01:37 PM.
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post #6 of (permalink) Old 07-25-2019
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Insurance may or may not cover it, depends on who you have and what type coverage. I know farm bureau in TN does not cover glass under comp unless you ask for that coverage to be added, typical ded is likely higher than the cost of the glass anyway. Best as I recall when I had allstate or state farm, glass coverage was built into the policy and there was a zero deductible.

Have heard of issues with the rear defroster shorting out, but had not ever heard of glass breakage as a result.

I have had a windshield shatter when washing the vehicle. Cold water on hot glass, figured the glass probably was compromised somewhere with a chip or small crack I was unaware of.

My 6 year constantly asks why. What adults can learn from 5 and 6 year olds, to listen with your ears and mind open. Hard to learn when you don't listen ......
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Originally Posted by 12 lt View Post
Insurance may or may not cover it, depends on who you have and what type coverage. I know farm bureau in TN does not cover glass under comp unless you ask for that coverage to be added, typical ded is likely higher than the cost of the glass anyway. Best as I recall when I had allstate or state farm, glass coverage was built into the policy and there was a zero deductible.

Have heard of issues with the rear defroster shorting out, but had not ever heard of glass breakage as a result.

I have had a windshield shatter when washing the vehicle. Cold water on hot glass, figured the glass probably was compromised somewhere with a chip or small crack I was unaware of.
My deductible is more than the repair will cost so...........

As for the Short causing the glass to shatter, I always say go big or stay home!!!

Now that I think about it, might need to check the defrost fuse to see if it blew or not.



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post #8 of (permalink) Old 07-25-2019
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Damn, how much is your deductible?
We've got $250 deductible on ours for comp through USAA.

I had Allstate back in the 90s with my 91 S-10. They did have a $0 deductible on the glass... well until I had 3 windshields replaced then they said I was going to have to start paying the deductible for comp. Funny thing is after that I never had a cracked or broken windshield again.


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Quote:
Originally Posted by impaler View Post
Damn, how much is your deductible?
We've got $250 deductible on ours for comp through USAA.
Think we took our ded to $500 when we added our oldest daughter to our ins to help offset. Not sure how much the back glass costs.

My 6 year constantly asks why. What adults can learn from 5 and 6 year olds, to listen with your ears and mind open. Hard to learn when you don't listen ......
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Quote:
Originally Posted by USN24 View Post
My deductible is more than the repair will cost so...........

As for the Short causing the glass to shatter, I always say go big or stay home!!!

Now that I think about it, might need to check the defrost fuse to see if it blew or not.


Check your policy closely - the collision deductible is often different than the comprehensive deductible (if any).

A claim for the comprehensive (glass breakage) will not affect your insurance rating, unless you have excessive glass breakage claims.

My wife is a personal lines (auto and home) insurance agent.
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post #11 of (permalink) Old 07-26-2019 Thread Starter
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I will just say I have an 18 y/o Daughter, a 17 y/o son and a son that is 15. We made all the deductibles pretty high to keep our payments manageable.

The repair quote is $398 so it is not going kill us. Thanks to everyone however for the comments.
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post #12 of (permalink) Old 07-26-2019
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Yea I looked online last night and saw the rear window was around $400. Cheaper than I imagined.


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Quote:
Originally Posted by impaler View Post
Yea I looked online last night and saw the rear window was around $400. Cheaper than I imagined.
No doubt, it could be a lot worse.
...
BTW, for those interested, some insurance policies offer a rider wherein you can pick up 0- or low-deductible glass breakage coverage for a nominal annual fee. This deductible is separate from any deductible for collision/comprehensive.

For example, you might still have a $500 deductible for collision, but only a $50 or 0 cost for a new window.

Doug

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Quote:
Originally Posted by plano-doug View Post
No doubt, it could be a lot worse.
...
BTW, for those interested, some insurance policies offer a rider wherein you can pick up 0- or low-deductible glass breakage coverage for a nominal annual fee. This deductible is separate from any deductible for collision/comprehensive.

For example, you might still have a $500 deductible for collision, but only a $50 or 0 cost for a new window.

Doug

.

We have the zero-deductible coverage for glass breakage - the additional cost is very inexpensive.

We live and travel is a semi-rural and rural area, with lots of commercial trucks with drivers who refuse to obey the law, and drop gravel and debris from their trucks. Broken windshields are common.
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post #15 of (permalink) Old 08-02-2019
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Wow, I've never seen this before. I have a 2014 LT and have had tint on the rear window for at least 4 years now. I doubt that tint caused the issue.

2014 Impala 2LT, Blue Topaz Metallic, V6, 19s, Bose 11 speaker sounds, almost fully loaded
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