Removing a 1991 Chevrolet Silverado door panel is pretty simple. All you will need to do is to remove the screws holding the door panel in place.
All the speakers in a 1991 Chevy Silverado should be 4x6 if they are stock.
Remove the inner kick panel. Disconnect the wiring harness. Drive the pins out of the hinges - remove door.
Remove the old and follow routing with new You will have to bleed the wheel that is affected
On that year, You can just REMOVE the battery cable for about 10 mins. Then hook it back up.
YES it is.
In the gas tank.
It is inside of the fuel tank.
.035 gap standard and stock