I have a 2003 H2 and its clicking in the exhaust manifold was told there might be swivel doors that are stuck but I've never heard of this before!!! I was thinking maybe a gasket or a loose bolt!? Is there something i need to know before i get into this?? Lol any help would be appreciated!!!!

 

Remove and replace the broken bolts.
Without the proper tools, there's also a quick fix:

 

i used those clamps they worked for my broken studs

 

Same here. I just needed one on the back driver side. They make two brackets. One fits back driver side or front passenger, the other fits back passenger or front driver side. Almost always one of the ends where it allows enough play to cause a leak and most common is the driver side rear one. The bracket is somewhat of a pain to install since you have to install one bolt blindly into the back of the head between the head and firewall but not too terrible and the brackets work great preventing the need to fully remove the manifold or mess with trying to extract the broken bolt.

 

there is also a third option that corrects the leaks from the middle bolts as well.