Engineering diagrams

Can someone tell me where I can find enginnering or concept drawings for different models of vehicles? I am looking for transparent profiles, flank, frontal and oblique. I want to see the outline of the vehicle with the mechanical components visiable...in other words. I have seen these engineering diagrams before but Im not sure where they may be archived on the internet. Looking for Suburbans, Impalas, Minivans, small pickup trucks. This has a practical application in the design of military training aids. Any help would be greatly appreciated...

This type of thing????? www.blueprint69.com