First as
@kennyw said you didn't tow it.

Second it was a Blazer.
The suburban is a different animal and if you don't have a bigger, heavier vehicle towing it, that long of a trip will be hell.
I have done crazy trips before, I even towed a 9000lbs built k5 on a dolly without brakes pulling it with my 97 Jimmy s15 for 300 miles.
I would not do it long haul, and it took me twice the driving time to be safe.
Renting even a dolly these days is so expensive, it's not worth it, rent a trailer instead, or buy a dolly and sell it afterwards