The early year trucks (probably your 90 included) had metal clips for that weatherstrip. After that they switched to ones where the clips are molded into the plastic and are really wide. You don't transplant the metal clips to those.
Unfortunately, the new style sucks...especially if you buy aftermarket. I got some from LMC and they installed great, felt tight, but a few weeks later started rolling up along with the window. I'd hazard a guess if you saw some with adhesive, it was someone trying to make that style stick to the door. They're garbage.
LMC is where I got mine as well. I had the same problem of them separating from the door on the past pair I installed. I didn't use the clips that time and thought the lack of clips was my problem. I found some OEM GM strips at a dealer for 200+ so that ain't happening. I may end up trying some adhesive this time around.
Pic below shows two of the six holes those clips fit in. That's the new runner sitting above the holes, it unsecured for the time being.
What did you end up doing to solve your problem?
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