P0327 comes up as a knock sensor code, while inputting the code might not do much I can put in "Knock Sensor" and pull up quite a few threads, see if that helps
So I replaced the front knock snesor. It cost me about $25 for the part. I had to pay my mechanic to put it in, it's just too cold out to be working on the car. Anyway, the light has stayed off now for about three weeks so I think I'm good.
How's your 4wd working? I noticed the thread title didn't say P0327 or C0327. Depending on how you read that code...could mean an entirely different matter. C0327 is a very common transfer case code. Both my TrailBlazer and Yukon have given this code for years. I pretty much deal with it as I'm too cheap and lazy to fix it 😁.