chevor wrote:
N-Trouble wrote:
Yes comparing SRW trucks only difference is the extra leaf spring on the 3500
This was changed in 2011 model year. 3500 trucks now have a top overload springs. 
Best place I found stocked with GM diesels is North Dakota.
The surrounding states as well.  Billings has a bunch on the ground, Idaho does to.  Although I have not seen it first hand but Wyoming likely does as well.  There are a lot of companies in surrounding states working in North Dakota.  They are buying up a lot of vehicles.