Forum Discussion

dave17352's avatar
dave17352
Explorer
Jan 21, 2016

2011 duramax and up fuel pump problems

I have read a lot about fuel pump problems on 2011 and up Chevy Duramax engines. I would like everyone that has a duramax of the these years to post mileage and whether they have had problems with there fuel pump only. Please post if you have had no problems also. Like this

2011 Duramax no problems with fuel pump. 35k


Kind of curious about this cause I have read all about the 10k fix.
I understand for about 4k you can put a cp3 pump in and not worry. Seems like a lot to spend just in case.


Thanks


Well I just found a poll on that on duramax forum. The results were just over 6 percent had total fuel pump failure before 100k. There were 339 responses to the poll. The poll has it all broken down if interested check it out on the forum.
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  • dave17352's avatar
    dave17352
    Explorer
    Jan 21, 2016
    N-Trouble wrote:
    Forum polls don't accurately represent real world fail rates. ITs a very small subset of the overall population. Only the manufactures know the true fail rates and you can bet they are not willing to share.



    True story. I have a tendency to believe the people on forums are more than average having problems with their rig. Therefor numbers have a tendency to be higher than is reality.
  • N-Trouble's avatar
    N-Trouble
    Explorer
    Jan 21, 2016
    Forum polls don't accurately represent real world fail rates. ITs a very small subset of the overall population. Only the manufactures know the true fail rates and you can bet they are not willing to share.
  • Me_Again's avatar
    Me_Again
    Explorer III
    Jan 21, 2016
    Yes, RAM/Cummins still uses the CP3 injection pump, while Ford and GM are using the CP4-2 injection pump. VW uses the CP4-1 with similar issues.

    Then along came all those that will say they have never had an issue, which is good, as the repair bill is 10-12K. If this continues to be pushed off(Ford) to one insurance policy, then rates are going to sky rocket!

    I believe the RAM 1500 ecodiesel uses the CP4 injection pump, along with the new 5L Cummins in the Nissan.


    Chris
  • IdaD's avatar
    IdaD
    Explorer
    Jan 21, 2016
    donn0128 wrote:
    GM and Ford use or used the same lift pump from Bosch. Both were quite prone to failures due to contaminents in the fuel. Earlier CP3 I think was the designation did not have the problem. Incidentially I think that is what Ram is still using. At last I read while Ford was refusing to honoe warrenty on them GM was quietly taking care of the failures.


    Ford and GM use the CP4, which as you stated are prone to major failures resulting in big $$. FCA uses the CP4 in the EcoDiesel, Nissan uses it in their new Cummins Titan and VW uses it in their cars as well. In the US I think the only engine that still uses the more reliable CP3 is the I6 Cummins.

    There was a guy who just in the last few weeks who had his 4 or 5 year old Duramax CP4 blow up on him, but GM stepped up and covered most of it. You can probably find that thread with a search.
  • donn0128's avatar
    donn0128
    Explorer II
    Jan 21, 2016
    GM and Ford use or used the same lift pump from Bosch. Both were quite prone to failures due to contaminents in the fuel. Earlier CP3 I think was the designation did not have the problem. Incidentially I think that is what Ram is still using. At last I read while Ford was refusing to honoe warrenty on them GM was quietly taking care of the failures.

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