problems with starting on 1993 GMC Jimmy

My 1993 GMC Jimmy recently started not starting in and around when we have big rain storms. I replaced the fuel pump a few years ago, and just recently we replaced the ignition coil. The next day it rained, and it wouldn't start. I've also tried stuff to remove water from the fuel and spray-on stuff to dry off wire connections in the engine.

Asked by for the 1993 GMC Jimmy
Have you inspected the distributor cap and rotor for corrosion?
Yeah, got the distributor cap and rotor replaced last year.