Hello everyone. I've been troubleshooting a very light pinging / detonation noise on my 2005 Chevrolet Silverado with 5.3L standard (not flex fuel) engine for several months. I'm putting this video out there to document my symptoms and all the steps taken before finally finding the actual issue. In my case this ended up being the intake manifold gasket or knock sensors. In reading up on my engine after making this video, it appears this engine model is the "LM7" truck variant of the LS small block and was used from model years 1999 - 2007. I hope this video is able to help someone with similar symptoms find their problem. Thanks for watching.