Do a google search and see how many problems people have and go from there.

I have a 2011 with the 6.7L and love the truck. I got rid of all the emissions crap at less than 15k miles. Have not had one problem with the truck. Bought it new February 5 2011 and have used it every day. Great truck IMO.

I have one 40,000 miles no problems so far.  the exhaust filter will force the truck into reduce power mode, if your idling on the line all day.. takes about ten miles of driving with rpms close to 3000 to clean out filter. 

The suspension sucks compared to my old chevy rig i had.  put 2" lift and air bags to get it to ride level.  It only 12,000 lbs loaded?  best fuel mileage I can get is 14 average is 12 worst has been 8. 

Sometimes it won't come out of park, after mulitiple trys and some smashing on brake and cussing it will come out of park.     The claims are after removing erg and exhaust it will get 18 mpg and more power.   I have no complaints about power it pulls my travel trailer just fine.  I have serious doubts that it will get 18.

seat belt dinger goes off constantly. got on youtube found the on off step on brake roll window down code to get the dinger to stop going off every two minutes, caused the check engine light to come on for six cycles of start up.

Other than that it's great!

RC i know where an old square nose dodge is with less then 100k on the clock....it has set for a bit but started every 30 days.  12 valve cummins  CHEAP.   Just pm me I will give you the number FIRST.