2000 Chevy Truck no start

Electrical problem
2000 Chevy Truck V8 Four Wheel Drive Automatic 63K miles

At 8 yrs truck developed crank but no start condition. When truck runs it runs perfectly. Replaced all secondary ignition components, crank sensor and fuel pump. As of late, if truck sits for a week after having run perfectly for days, it seems especially vulnerable to no start scenario during high rain, low barometic pressure conditions such as we have experienced recently in Connecticut. After 2 days sitting in the sun, the truck reluctantly started and now runs fine until the next precipitation. Is there a solid state component that is susseptible to saturation? Thanks, Art