I have a 1991 Pontiac Grand Prix 3.1 FI. My engine codes point to the knock sensor. I want to replace it. The Chilton book is an example of useless information for this component. It only says (I almost quote): a) raise the vehicle, support it safely; b) replace the knock sensor; c) carefully lower the vehicle. Not a diagram, not a picture of where the hell that sensor is.
Any additional information on the web ? Any pictures ?