Chillywilly

k, hear u on the rusted’ or stuck’ perspective and applying WD40. Clearly spraying on the outside of the valve when the exhaust system is cold is the way...concerned the residue of the WD40 on a hot exhaust system.

Exhaust system is stock OEM. Tried to twist it both ways by hand, doesn’t budge. Putting a tool on it...mmm

2020 5.3L with 40K. 1100 to 1400 RPM and the drone won't shut up....Service Mgr at dealership say 'live with it', I say live without my business. Rant over...how do I fix this simply and effectively. Really want counsel from folks who have fixed it successfully. Thanks in advance