The threading on my awning seam is starting to fray in one place and it's a 2012. I folded a little EternaBond tape over it (in just one small section. That could not be done on the entire seam). If yours is a 2008, I'm guessing it has just about run its course and probably needs to be replaced...unfortunately.
2012 Eagle Super Lite HT 26.5RKS
2005 GMC 2500 SLT HD D/A