servise engine light on on 2002 Chevrolet Silverado 3500

sinse the truck was new,once or twice a year it won't start,
it will just set & grind, The nexd day it will start right off,When ever I pull my 5th wheel RV my sevice engine light stays on,Diagnostic showed air intake,I put new senser & air cleaner, it don't help

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1 answer
What code did you get that says "Air Intake"? Codes don't tell you what parts fail. They give you direction to diagnose further. You may have unnecessarily thrown parts at your truck that it did not need.