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2002 6.0 Bad Muffler? Baffle? Corsa Upgrade?

RLGDiesel

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RLGDiesel Enthusiast

RLGDiesel

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The last part of the exhaust buzz/vibration/moan/whirr/resonance saga...2002 CADILLAC ESCALADE AWD 6.0

 

After having the O2 sensor replaced and heat shield welded to no avail, I am left with the intermittent exhaust resonance at 2,500 to 3,000 rpm (only this range). It still occurs with the AC on/off, transmission P/N/D/3/2/1, and engine cold/warm.

 

I took the truck to a muffler shop today. When the owner pounded on the front part of the muffler (toward the engine), he noticed that the muffler was dented and hollow sounding whereas the back was firm (did not bounce and pop when he banged on it). He mentioned that the front part reverberating and popping could be the source of my noise since the inside baffle may have disintegrated, so I am seriously considering upgrading to a Corsa Touring system 14221.

 

Has anyone ever had a bad muffler on these cars? Is the Corsa a good move at this point or should I look more carefully at the cats to be sure they aren't bad before going forward?

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