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question about a 90 buick

This is a discussion on question about a 90 buick within the General Help forums, part of the LSx Technical Help Section category; First off, never under any circumstances do a t-stat on a 90 buick with the 3800. That's the worst t-stat ...

  1. #1
    Veteran 0rion's Avatar
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    06 duramax

    question about a 90 buick

    First off, never under any circumstances do a t-stat on a 90 buick with the 3800. That's the worst t-stat I've ever messed with. Secondly, never do it for a friend for free.
    That being said I noticed something with his car that I'm wondering if any of you have ever fixed. When you start his car I can hear what sounds like the heater vent door in the dash popping. I'm assuming it's probably sticking a little bit. Anyone ever fixed that issue without tearing the dash apart?

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    00 LS1, WS6, V8 Gremlin
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    Oh, I can think of a ton of things harder than that silly thermostat and your other problem can be one of them.

    I don't have the manuals here at home nor do I have a photographic memory of that setup but if I recall it isn't too hard to get at some of the works without pulling the dash. In many cases what you'll find is a vacuum hose that's somewhat deteriorated or, if it's the solenoid/motor operated version a bit of lubrication at the pivot point can often help. Sorry I can't be more specific, the HVAC varied in design on that year.

  3. #3
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    your door is sticking. That's the popping noise. It'll still open but it sticks a little bit when you first open it so it makes a popping sound. If you're really worried about it then you can go in and clean/lube it up, but you WILL have to take at least the glove box out. I'm not too sure about having to take the whole dash out tho...

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