if it is an 350 eng it is located at the rear of the intake manifold,on the top of the block, next to the dist.
It is inside of the fuel tank.
In the gas tank.
All the speakers in a 1991 Chevy Silverado should be 4x6 if they are stock.
3200
85 mph.
YES it is.
== ==
Generally, a stock silverado will have four speakers; two in the dashboard and two behind the seat.
Was built for R12, can be converted to R134a.
.035 gap standard and stock
1157 1157
YES, It will bolt right up with NO modifying.