I searched and found that people were mainly using 93 oct to eliminate it.

Mine will do it under part throttle and full throttle. It won't do it all the time though. I talked to 2 different dealers and they didn't know anything.

I got on the GM Dealerworld website and found out about the rear knock sensor problems with the older models. Do you think this could be the case with mine? If I have a tech hook up a computer to it, will the deto show?

Thanks for any help, Mike.

 

is your truck stock?

if not, What mods do you have?

 

this is kinda important to know...

 

It's bone stock.