2001 Blazer LS Z4

Misses when it rains. Live in a wet place and when it rains it misses. Almost feels like it's cutting out. Had shop work on it last spring and they replaced an air intake and associated motor that they said took in water and failed. They said the design of the intake location was the problem and the new air intake would solve it. Lasted for about 4 months then same problem. Don't want to throw good money after bad and am not an experienced garage mechanic. Help!!!!

A full tune up?
When was the last time the truck had one done???
New Wires, cap, rotor, Plugs, Etc.............

I assume you would suggest GM OEM replacement parts??

I assume you would suggest GM OEM replacement parts??
If the GM OEM parts weren't good, the damn thing wouldn't run right coming out the factory door. Want it to run like new? Then get it that parts it had when new.