You will have to buy one at a auto parts store or order one off the internet because you can not get one off the internet for free.
wiring diagram for firing order for 1992 Chevy silverado
try www.haynes.com
haynes or chiltons will have this
you can usually find what you are looking for at carstereohelp.com
try haynes.com
radio wiring diagram
1992 Chevy 1500
A wiring diagram will make sure that everything is connected correctly. The wiring diagram for a 1992 Buick Skylark can be found in either of its manuals.
http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152801c92c0
i need wiring diagram for 92 buick lesabre
All of the different wiring diagrams are in the back of the haynes repair manuals made for astro vans. you can get them at any autozone or advance
A HAYNES manual will tell you this $19.00 NAPA stores. Very handy for all your repairs.