best bet for free is a junkyard..
sprak plug wiring diagram chevrolet lumina 1996 3.1
You don't really need a radio wiring diagram just go to walmart and get a adapter converter kit for about 14.00 : - )
you have to buy the car manual to find the wiring diagram!!! local library should have the chilton manuals, you could look there.
The Chevrolet Camaro security system wiring diagram can be obtained from most Chevrolet dealerships. The security system wiring diagram can be found in the security system owners manual.
The wiring diagram for this can be found in the owners manual that comes with it at the time of purchase. The wiring diagram for the car hook up can be found in the cars maintenance manual.
You can find a Chevrolet S10 fuse block wiring diagram in the back of the owners manual. You can also find the fuse block wiring diagram at most Chevrolet dealerships.
Try MOTORLIT.COM yyou can get either a wiring diagram or owners manual which will have it.
I have a repair manual for Luminas, 1990 - 1995 if I'm not mistaken. I keep it in the car, because I have a 1990 Lumina Euro. I can make you a copy of the wiring diagram and possibly email it to you or if it's too big for that, I could mail it to you via USPS. Dundee
In a wiring diagram or owners manual. Both can be gotten from MOTORLIT.COM
in the back of a service manuel
A service manuel is the only place I have seen wiring diagrams...
Go to your local auto parts store, i.e.O'Reilly Auto, Carquest, NAPA, and purchase a paperback manual specifically for your Lumina. Usually about $15.