1999 Tahoe Timing Chain

I am down in central Florida on a little vacation. I was driving at about 45mph and the engine made a loud clunk and shut down no check engine light or anything. I tried to restart it, the engine turn over but it's weak then strong. it sounds like it has bad timing. I am thinking the timing chain broke. How bad is it when a chain breaks? My truck has about 119k on it and this is the first major issue i have had..

Anyone know of any reasonable shops in the Orlando area? please email me [email protected]

Found out today the rotor blew off and all the contacts under the cap were burned off. This cap and rotor are only 6 months old, I have never heard of this happening