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Gen 3 ZR2 cracked headlight

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550 views 18 replies 14 participants last post by  Mad German  
#1 ·
Hi All,

Well this is a bummer. Looks like a rock strike cracked my headlight. From what I understand repairing headlight plastic isn't possible. Unfortunately you can't replace just the lens, you must replace the entire assembly. I may wait until it starts fogging. Replacement cost with labor is in the $1500 neighborhood. Anyone else have this happen?
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#2 ·
No, not yet but I already have a chip in the windshield. Not big enough to require replacement......unless it spreads.

I think that this would be a perfect example of where the soft clear plastic headlight protection would have paid for itself. $1500 is a bit steep . It is what it is.
 
#3 ·
put a little super glue on it, so it will not collect moisture as quick, take a super small brush and brush it on...

I do not think it is too hard to replace it, the 2nd gen took me about 20 minutes...
 
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#17 ·
You replaced a headlight on the generator 2 in 20 minutes? Can the headlight be replaced without removing the grill and front fascia/bumper?
 
#4 ·
I haven't had that happen to a Headlight in years
But I did have that happen to a Sealed Headlight many years ago...
 
owns 2017 Chevrolet Colorado Z71
#7 ·
Damn, sorry to see that, hope your insurance covers it!
 
#8 ·
What about using some of that protective film? I know it's kinda like putting the cart before the horse at this point, but maybe it will seal it up and prevent it from fogging up?
 
owns 2023 Chevrolet Colorado Z71
#13 ·
How far are you willing to try to save it?

I don't know for a fact about these GM headlight units, but I know on Subarus and many Fords they are one massive sealed assembly. You need to heat them up to open them up. I remember throwing them in the oven at a low temp to loosen the black seal just enough to where you could open them. Once you do that, I'd drill a tiny hole at the end of the cracks to keep the crack from propagating. Then I'd inject the resin they use to repair cracks on windshields. When that sets, use a sharp razor to cut the excess off. Unfortunately because of where the crack is, you need access to both sides so you can cut it with a razor. The index of refraction (1.59 vs 1.52) of that resin and polycarbonate are fairly close, so if you inject the resin right, the crack should almost disappear like magic.

The index of refraction for super glue is around 1.49 so that's pretty close to polycarbonate too. If you do nothing else, consider trying to seal it with super glue. The problem is that it probably won't flow into the crack.
 
#15 ·
Ive already got what looks like a small Crack in my drivers side headlamp assembly. I think mine is just superficial and not all the way through, more like a stone chip. Kinda makes me miss the old seal beam headlamps. $5.00 and a couple of screws and its fixed. They were truly awful compared to modern lights though.
 
#16 ·
Yeah modern lights are pretty much all not repairable. Just gotta replace them. I have seen some people open up their factory sealed units to modify them and then glue them back together but that is a pretty tedius and risky process. In theory if you found a used light with a good lens but something else wrong you could try and swap the lens but probably not worth the effort for something that may not work anyway.

Some people PPF their factory lights to help prevent damage to them since they are so expensive. I hope to just replace mine with the ANZO units once they come out. Much cheaper to replace than OEM if I break them off roading and seems like people have had good luck with their quality.