Re: Vent Window Assembly
 

I'm interested to know what problems the Precision seals has? These have been in the industry since early 2000's and I've yet to hear any issues that need to be addressed with them.

Derek

Re: Vent Window Assembly
 

Thanks. I did call LMC today about an air cleaner snorkel to the core support.

My question I thought was pretty simple

Me: "I want to buy your air snorkel for my 86' C30 but you don't even HAVE this truck in your drop down on the checkout screen."

Them: "we don't have any mechanics here that can tell you if it will fit. You should find a mechanic and ask them."

Me: "What brand are you selling so I can look around for info."
Them: "We source from many manufacturers. We cannot tell you what you will receive"

Me: "Kind of makes it hard to research information when I don't know what you are selling".

Basically no help whatsoever.



For now I'm going to search the junkyard. Need to get that lower pivot re-attached first anyways.

Re: Vent Window Assembly
 

yep, LMC doesn't do bigger trucks. Enough crosses over from the 10 series that they are not completely worthless. You just have to figure out what will work.

Re: Vent Window Assembly
 

Does LMC sell your seals? If not, then who does?

Re: Vent Window Assembly
 

LMC buys some Precision products, they also source directly overseas on a lot of parts. There are many vendors that use Precision, you just have to ask them on a particular part if it's Precision, or buy direct: http://precisionrestorationparts.com/

Derek

Re: Vent Window Assembly
 

Where to begin?

They're so much thicker than the factory seals. Easily twice as thick, maybe more. That of course makes them not fit very well. Also makes them more difficult to work with than they had to be. I can't see any reason they need to be that thick. The factory ones were thin and lasted since 1987 and didn't start leaking until they got to be over 20 years old. I had to get a heat gun after the Precision ones just to get them to get in place. And once I finally got them on, they had a lot of air leaks. Some were so bad that no amount of "ingenuity" was going to fix them. I'm not talking about some kind of torn hole, I mean a factory defect in the seal itself that wouldn't let it seal the leak. I had to use RTV silicon to seal up these holes at the top.

They were about 3 mm, way too much. Once I got the old factory seals off, I laid them next to the Precision brand seals. There are so many differences that I won't be using Precision again. Not worth it. Sorry. Not trying to be rough or anything, that's just my experience. Right now I feel like the seals on the truck are sub par and will need to be replaced with something that fits better.

Re: Vent Window Assembly
 

Thanks for the reply. Sounds like a rough deal. With such a poor fitting seal I wonder if you were sold the wrong set? I say this because NOBODY should need to use RTV silicon to seal these up...ever! I hear about people getting the wrong seals for these trucks from time to time because of the vagueness of the 81-87(91) year span and the fact that the doors and the vent assemblies are interchangable throughout the 73-87 trucks, however the vent seals themselves cannot be interchanged. Let me explain a little further>

73-80 - These are the two piece style where the vertical division bar weatherstrip rivets to the division bar.

81-85 - These are the two piece style where the vertical division bar weatherstrip has metal fold over tabs that insert into the division bar and fold over.

85-87(91) - These are the one piece style where the vertical piece simply presses into a channel on the division bar. Of course being one single piece this is easy to spot from the other two.

The 81-85 & 85-87(91) is a vague breakdown but is what is more common on these years. Last week however I spoke to a guy who had an 89 suburban with a two piece style. He told me it was original!

These vent weatherstrips MUST use their respective vent assemblies and cannot be interchanged.

Skunksmash, if this does not sound like your issue then PM your number, I will need to ask a lot more detailed questions, but very happy to help.

Derek

Re: Vent Window Assembly
 

Derek,
I took a hard look at the seals on our 86' C30 and could not determine if they were one piece or two piece. Do you have a photo of each version mounted up to show how to tell the difference?

Re: Vent Window Assembly
 

I purchased/installed the 2-piece from Precision for my 86 a couple of weeks ago and am happy with them.

I will say that their installation video was not really a help but after I realized that vaselene was my friend all went well and no glue is necessary.

No more wind noise and after I realized my rear window tracks where bolted in using the wrong holes in the door (paint shop) my windows even stay in the track now.

I can take a some pictures tomorrow if anyone is interested.
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Re: Vent Window Assembly
 

Got mine from the dealership, they were once piece. When I was at the parts counter I noticed how thick they were and I asked the parts guy what the difference was. He told me that GM had subbed out the production of the seals to Precision, and that likely accounted for the difference.

Re: Vent Window Assembly
 

You can check by rolling down your window and pulling the glassrun away from the division post a little. If you see metal fold over tabs, that will be the 2 piece style. If you see nothing but the bare metal of the division bar then that will be the 1 piece style.

Call me at the number below if you need more help.

Derek

Re: Vent Window Assembly
 

Thanks. Totally forgot to check today when I was at the ranch - will check this weekend.


Anyone know how that post is attached to the glass frame? The driver's side on this truck, the post is broken off.

Re: Vent Window Assembly
 

I believe that post is welded to the metal u channel that is directly attached to the vent glass. It may be possible to weld that post back to the glass frame but might be better to try and source the vent glass from a wrecking yard. We also sell complete refurbished vent assemblies if you're interested.

Derek