No affiliation, just saw it while perusing... it’s hard to imagine a motorcycle carried that far back, plus the wheels weight, but I’m tempted to make a drive to get a closer look.
https://killeen.craigslist.org/rvd/d/2002-chevy-silveradox4-pop/6582678270.html
https://killeen.craigslist.org/rvd/d/2002-chevy-silveradox4-pop/6582678270.html