at the dealer or in a good garage with computer.
At a GM dealer
you can find the wiring diagram for a camaro in either a chilton auto maunal or a haynes automanual
You can find a Vacuum hoses diagram for gm diesel 6.5 at any department stor. They can be found at Sears or auto motor store. They are also available on Ebay for a bid.
I have the diagram that I got off ALLDATA. "GM does not provide a timing mark diagram for belt installion without using the special tool(s) listed in the Timing Belt service procedure." But I did mine without and only used two vice-clamps to hold the front to cams in line and the back two. Line those marks up and the Crank's mark will need to be set about at "2 o'clock" its wierd but that's how they are made.
A person can find a wiring diagram for a 1997 Pontiac Bonneville at most GM dealerships. The dealerships are happy to help customers with any requests.
I found two sources for manuals: http://www.levelten.com/store/gm/gm_techmanuals.htm http://en.wikipedia.org/wiki/Turbo-Hydramatic_125
A timing CHAIN
it has a double-roller timing chain.
Go toautozone.com and look in repair info.
When in doubt, call a GM dealer's service department.
chain
GM's 4.3 liter Over Head Valve , V6 engine has a timing CHAIN