I am leaking brake fluid in my 2003 silverado. It is coming from the connection between the metal line and the hose going to the caliper. My question is how hard is it to replace the section going to the caliper(which i believe includes the connection piece). Also, should I run a new metal brake line to master cylider? It is a bit rusty. Trying to figure out if this is a job for a mechanic or if I can do it myself... I would like to save myself the $75+/hr if possible.