Originally Posted by
KRT
The 11-16 Duramax code named LML have a fuel system known for failure. I believe I have a thread on here. The high pressure pumps (CP4) come apart and contaminate the entire system with metal shavings costing 9 to 10,000.00 in repairs. I’ve done 2 and both were 16’s. The 17 code named L5P Duramax is a redesigned engine and they went back to a lift pump design fuel system which is a lot more reliable.
I would do a “street delete” to any of them. SCR,EGR, DPF, and DEF delete. Put a shift on the fly switch in and tune it.
If I owned a 2011-2016 Duramax, other than the mentioned above it would get an Airdog lift pump installed immediately. Even if I didn’t delete the truck I’d install a lift pump. $1300.00 for a added lift pump is a great insurance policy.
If the price is right on the 16, get it and bring it to me. I’ll get it more reliable for you.
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