How to protect a stock LML CP4 pump if you refuse to do a CP3 conversion?

[JunkyardDog_02]

Let's face it: not everyone has $3,000+ laying around to upgrade to a CP3 pump the second they buy an LML Duramax. I want to keep my 2014 Silverado completely stock for warranty and emissions reasons, but I’m terrified of the Bosch CP4 grenading and totaling my entire fuel loop with metal flakes.

For those of you who have successfully pushed a stock CP4 past 150,000 miles without a failure, how did you do it? Are you running a lift pump like a FASS 165 at 8-10 psi to keep it constantly fed, or is it purely about dumping heavy lubricity additives into the tank at every single fill-up? Give me your exact fuel maintenance routine to keep the 'disco glitter' away.

 

[DieselDrifter_TX]

If you do only one thing from this thread, open your browser and buy an Exergy CP4 Disaster Prevention Bypass Kit right now. It costs less than $200 and is 100% emissions-compliant and stealthy.

Here is why it's a lifesaver: The factory fuel routing loops the internal crankcase fuel of the CP4 back into the high-pressure rails. When the pump destroys itself, it injects metal shavings straight into your injectors. The Exergy kit reroutes that dirty return fuel directly back into the fuel tank, passing through the factory fuel filters before it can ever touch the engine. If your CP4 decides to grenade tomorrow, you only have to replace a $1,000 pump instead of a $10,000 complete common-rail system. It is the cheapest insurance policy on earth for an LML.