I recently turned my 02 2500 avalanche from single exhaust to true fuel exhaust. My old exhaust was in need of repair for some time but now it seems like one side of the exhaust sound almost like a tractor exhaust. You know the pu pu pu pu sound the other side has a very nice hum the only real info on the exhaust installation I can give you that may be a problem but I don’t know if it is but the muffler shop didn’t install an H or X pipe other than that! Lol please any advice thanks!!