Van chassis specs

[gkent]

Is there somewhere I can find the dimensions of the GM  van chassis? These are often used by frame straightening and body shops. I'm hoping someone can point me to an online source for various years. Thanks.

[davester]

you might try googling for upfitter diagrams for vans, they might be freely available.  Otherwise, I would expect you need to pay to have access to them, via the full-service manuals...