autozone.com is an excellent resource for finding repair guides, diagrams and trouble shooting. It would be my first recomendation. They have an impressive library of online repair guides which seem to be copied straight from chilton's manuals.
What engine? V8? 18436572 for chevy 1991 silverado v8 350 diagram
All the speakers in a 1991 Chevy Silverado should be 4x6 if they are stock.
3200
85 mph.
you might try www.haynes.com
NO.
I need a diagram for the 1991 Chevy blazer to see where the 3 hoses go to coming off the transfer case.
www.autozone.com
The diagram.
YES it is.
Generally, a stock silverado will have four speakers; two in the dashboard and two behind the seat.
1157 1157