Lock mechanism probably frozen or broken--you should be able to access by removing inner door panel to determine problem
That is the knock sensor
No.
Perhaps slave cylinder, line or fitting leaking?
The 1989 Chevy Silverado pickup truck window wiper relay switch can be found on the firewall in the engine compartment. The relay switch will be on the passenger side of the firewall.
Underneath the passenger seat.
under passenger seat
No it will not.
Yep... It should have one.
.035
On the fuel line.
.035
It depends on the height of the curb.