No brakes

[Notmyhoe]

Hi yal, I have an 03 Tahoe that blew a right rear caliper so I replaced it. The system went dry an I've been trying to bleed it to no avail. I've been told I need to take it to a dealer for them to bleed an reset the system, I've never heard of that is that true. On the other hand I've been told to just keep bleeding or that it may be the rubber line. Whatever the problem I also have to factor in I've been having heart issues an really can't be rolling around under it alot. Please someone HELP