Ok, I'm curious.....what are some parts that are pretty much interchangeable for all the trucks in one particular year? Frames all the same when it comes to trucks/SUVs.... what about the vans? Totally different?

I was thinking to myself today (I do that at times... it means I'm *really* bored) and was wondering if things like wheel well shapes are the same across the board when it comes to trucks/suvs/vans, etc etc.

Anyone care to weigh in and share a little insight?

How does GM cut down on cost by making things that fit as many vehicles as possible?