Sorry to hear about all your issues. I live near you in Windsor Locks. I am a PA practicing in General Surgery, but once did orthopedics. That's a crappy injury. I have a 22 GMC 1500 with the 3.0l Duramax. 37K miles and so far has been flawless. Which dealer fixed your truck? If you need anything, give out a shout, I'm right around the corner.
Jim