So with my new 383 engine I just built, for my turbo Blazer, I decided to install the knock sensor. I have not had it on the truck for years, but I would really like to use it now. I was lucky enough to find a V8 memcal ( I was using a V6 ) in the salvage yard out of a 94 full size truck, but it was a 305, not sure if that makes a difference or not. Anyway, I bought a new knock sensor from Autozone which I had matched out to what was originally in my truck, 1994 Full Size Blazer with a 350. Every thing is hooked up correctly, I ohmed the wire back to the PCM and its good. As soon as I start the truck I get this code. I know there are a lot of different combos GM had with the knock sensors. Could it be that my combo just will not work?