Went to a custom exhaust shop today and asked them to 'Make it quiet'. They installed a large stainless Magnaflow resonator in front of the stock muffler and told me to take it for a spin. No more drone between 1000 and 1500 rpm! Next removed stock resonator and installed stainless Magnaflow resonator plus a nice stainless tip. Even quieter! After two months of putting up with this 'drone', it's problem solved. All joints were stainless welded.Going back to get part #'s tomorrow if I can. Next step, quieter tires than the Goodyear Wrangler HP's that are on it now. I almost have my Cadillac Yukon.... Work done at Hot Rod Scott's in Toronto.