2011 duramax and up fuel pump problems

ricatic wrote:

Huntindog wrote:

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.

The failures are real. At one time I read the govt. statistics on them. There was/is some sort of investigation. At that time, GM had about twice the failure rate as ford reported. (it is a very small percentage of trucks)
But there may be some discrpancy in the failures reported as Ford was taking a hard line stance, and refusing warranty on many of them. GM was taking care of the customers, and fixing the trucks, then reporting it. If the warranty denials from ford were included, then the failure rate would likely be pretty much the same for both of them.

I have a 2011, 60K, no problems

Dog...good to hear from you...it's been a while...glad your GM is going strong...mine sure is I've managed to drive it 50,000 miles with no issues...oh...wait...it has the CP3 pump...

All kidding aside, I feel like I have a better handle than most on the CP4.xx issues. Here are some facts about the pumps:

1. Ford and GM use the same Bosch CP4.2 fuel injection pump and that usage began in the 2011 Model Year
2. There have been several, at least a half dozen changes in the internal design of the CP4.xx pumps...including moving production to a different plant in a different European country.
3. ASFAIK, there is not an adapter setup to install the much more reliable CP3 pump into a CP4 application. Besides a different configuration, fuel pressore calibrations would be way off. The CP 4 operates at a much higher pressure,almost 30% higher. This is a big component in both the increased fuel mileage of CP4 equipped vehicles...and in their much higher failure rate than the CP3.
4 The difference in the handling of warranty repairs for these pumps between manufacturers is real. Ford has a reject all at first look...GM has fixed them all under warranty...only a new buyer can assign a value to that situation as it pertains to a purchase decision.
5.The real cost to fix this problem, at least with Ford, is over $10,000...my repair was $10,300.00...and if you do not make these repairs to Ford's specification (replace everything but the tank)the engine warranty is flagged...seeing that Ford does not fix many of them under warranty anyway rends that position moot...

I close this missive with a comment made to me during my Ford ordeal by the lead engineer at Ford for the 6.7 engine project...paraphrasing for brevity..."I was at Bosch the other day. I walked by two pallets full of failed CP4 pump returns...one Ford and one GM...looked about the same size pile of each..."

Regards

This difference in handling CP4 claims is the primary reason that I ended up going with GM in a SRW 3500. I would have likely given Ford a hard look, but I wasn't interested in supporting a company that was taking such a hard line on a problem that was not the fault of the customer.

Only 8K miles so far, but very happy w/ my 2015 Silverado 3500.