96 3500 Foot Vent Replacement
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It's part of the Ram-Air ventilation system (forced air). On vans without A/C there is a door on both the driver and the passenger sides - with A/C there is only a driver's side vent. The lever broke off of mine and I was able to get a replacement at the junk yard. There are something like 4 screws that hold it onto the interior. Once it's off, you'll see that it's a simple door that slides back and forth in a larger housing. If you can't find a replacement, you should be able to find a way to glue something onto it where the tab broke off. Hope this helps.