I bought a 1500 Ram PU last summer.  I going over the paperwork I saw that it included a 'lifetime warranty'.  When I questioned the salesman and the guy who handles the paperwork I was told this was included in the deal.  I was very satisfied with the deal I got.  This was the second truck I had bought from these people (first was a Sahara Unlimited Jeep)  I just have to keep a record of oil/filter changes and they do the rest.  They will do a service when they do a general service and check when they do the oil change etc.  
I have been very satisfied thus far.  I think there is like 7600 miles on it now and it will be due at 10 thousand.