I’ve pulled a Suburban that was off the road and high centered on a heavily consolidated snowplow created snowbank back uphill to get it unstuck, and it’s 4wd mode had failed and it had road tires. Not easy and the driver was in total shock when we got it out. He was worried I’d get stuck just backing down to try.
A Suburban is not a bus, but 80’s are heavy and can do a lot more work than they seem. That bus has aggressive tires and that was a simple pull. If it had been dead weight, than yes, NO WAY.