someotherguy
I'm Awesome
Yeah, years ago I got in a debate with someone on FSC a while back about it, because I mistakenly assumed the earlier trucks were like 94-up, just open inside the fender. The earlier trucks in fact have a piece of plastic ductwork inside the fender that some feel is a restriction. It's fairly easy to remove; has a push-pin in the mouth of it and a single screw up near the battery, grab it with vise grips and snatch it out as it's slightly flexible plastic. Pretty sure I checked a few 93's I had on the lot at the time too and determined 88-92 trucks were the ones with this piece, hence the captioning on the pic:I believe Someotherguy has said that GM used the inner ducting early on, and then dropped it.
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Richard