Postby slownlow43 » Thu Feb 02, 2012 8:14 am
From my research the knock sensor code itself won't cause the CEL to come on, and is VERY common with these motors. And, like you stated, it's a pain to change so most people don't bother with it. Basically what I'm saying is don't lose too much sleep about that.
If you can have your friend rescan your truck and write down the codes, then post the codes up here, that would probably help you get some help.