We have gm1500diesel.com and f150diesel.com, both are pretty new with very little traffic.. but I'm trying to build those up as I did this one.
For more generic discussions, the "Other Diesels" sections should work I would think.
Welcome! Perhaps FCA can help you other, otherwise I would look at a used engine then a local mechanic to get the truck back on the road. That's your best way out at this point if FCA doesn't cover the engine.
Welcome! 10K is the service interval. I'd recommend reading around our forum as we've got a ton of info around the EcoDiesels here.. also, most dealers up charge just because it's a "diesel". I'd recommend changing it yourself, as it's super easy.. also, do keep receipts for proof of oil change...