I have a 2000 chevy blazer 4x4 with a 4.3 L engine i get this code of P0327 which is a knock sensor i know where it is ,Its located under the distributer on the left side of the engine but does anyone have any ideas on how to change it please help me !!!!

 

Deep socket, universal joint, and an extension. You have to be able to work somewhat blind, but it is definitely do-able.

 

Just changed mine. Its alot better if you take off the dist. cap and move the fuel lines then that gives you just enough room to get you rhand and an extension down there.