A diagram of what? The electrical system, vacuum circuits, it would be good to know what you are referring.
I recently received (May 2008) a recall notice from GM about the bolts in the front doors that attach the window to the window regluator. A defect has been noted that could result in the glass...
under the hood
They were made in Fullerton, CA at the NUMMI plant. New United Motor Manufacturing was a joint venture between GM and Toyota.
1500 pounds and that includes driver but not passengers and cargo.