Re: 6,0 oil pressure
 

There are different orings for use with GM or Melling pumps. When I installed a Melling 10295 on my 5.3 I learned you use a different colored oring for the two different pumps plus it depends on whether the pickup has a tapered end or straight. Red, green, blue and black. Good instructions came in the Melling box.

Re: 6,0 oil pressure
 

Bill that is excellent information and sometimes overlooked. If you Change the pump get it first then get the right o-ring. Have seen a repair that fixed the problem initially but it returned. Melling pump with o-ring that was ordered for the year of truck and engine application.

Re: 6,0 oil pressure
 

My 2011 2500 with a 6.0 has 60,000 . Is ok now . Did they fix the problem by 2011 or am I looking to keep an I out for this problem .