Duramax LML CP4 Failure & Solutions
We all know the 2011-2016 LML Duramax features the CP4 injection pump which was supposed to be an "upgrade" over the CP3 units on the 01-10 Duramax trucks.
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Why the Blue Spring Kit On the 6.0L Powerstroke is Important!
For such a cheap price and easy install, this little product is worth every penny in my experience.