K&N air filter/ reprogaming needed?
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if you get a check engine light then you can try unplugging the GEM fuse (dont know the exact location). that does the same thing as disconnecting the battery without resetting your radio and all that.
usually an air filter will not cause problems but with the newer trucks they can confuse the air meter.
usually an air filter will not cause problems but with the newer trucks they can confuse the air meter.