1998 chevy c1500 won't start. In the rain

When the key switch is off and the engine is not running, do you have power to the coil ? Could be a problem with the key switch.

what you have coil or cap and rotor.

the high humidity (water) is attacking your electrical starting system, whens the last time you changed your spark plug wires , distributor cap & rotor ? how about your fuel & air filters ? cleaned your battery terminals ? try it , it will help !!!!!!!!!

could be moisture is that year a coil pack or distributer

battery,or altenator

Had the same issue with our 1999 chevy astro van, would crank but would not start. It had been raining and windshield had a leak, after 2 days of no rain it started. Pulled codes and was the Security system in the ignition switch. Hope this helps.

Do the RPMs raise?

i could poll and instol one for u

Whenever I had this problem, it was always cured with a new set of GOOD spark plug wires. Not generic set off the parts store shelf. Get some moisture removal spray and put it on both ends, the coil and the plug, before putting the wires on. Do one wire at a time so you do not get them mixed up. I do not think you have a distributor or a cap. If you do replace it also as it is over 20 years old.

Try Checking your distributor cap, sometimes it will have a small crack that you cannot see.