On ours, it is the engine exhaust that hangs low and exits behind the driver's side rear wheels.
We have scraped the heat shield here and there, never knocked it off nor hit a curb when backing into a parking spot. Doug has cinched it up a few times for reinforcement, and we have also had its' holding bracket replaced once.
It may look
like it won't clear, and you may need to watch it carefully, but it may well
clear and you just don't know
it. Might take a measurement.
Yours may also be hanging extra low because it has been bumped and something has come loose. If it hasn't been looked at good from underneath, that would be your first step.
Doug's concern if you tried to reroute this is that you may affect the performance of the generator.
We have more problems with the front bumper and high curbs. Ground clearance is not the Interstate's strong suit. It's all part of the charm.