2011 2500 6.7 186000 miles 4900 hrs. should I be worried about the in tank fuel pump quitting on me ? what to replace it with?

Do you have a rail pressure gauge?   the stock pump does just fine.  

 

might be worth seeing what your pump is doing with a fuel pressure gauge, but I would not throw money at an issue that may or may not exist.

I don't have any gauges just got the truck last week. was concerned about hours and miles planning a long trip don't need any problems

 

I would do a check on all fluids then.   rent an oil pressure gauge from autozone and test your fuel pressure.  

 

Get an obdlink reader and you can verify all the sensor data, including rail pressure.
 

 

Edited October 19, 20186 yr by Me78569

thankyou I will do this sounds like I can learn a lot about my truck

 

I replaced one in my 2016 with 300k miles on it.  Looking back, I should have fixed it 50k miles earlier.