There is no doubt that the CP4 pump found in the LML Duramax has proven to be less than desirable. These pumps have a tendency to fail for many reasons and when they do fail they send metal shavings into the fuel rails and injectors resulting in the need for a complete fuel system overhaul that will cost several thousand to repair.

Number 1 cause of failure is water or dirt contamination which is not covered under GMs warranty. In order to prevent this from happening we have developed a kit to convert the LML to accept and run a much more reliable CP3 pump that was found in the 01-10 Duramax. Not only could it handle more abuse than the CP4 it's output is also considerably higher which makes it a great upgrade if you're looking for more hp.
Features:

• This kit contains everything needed to swap from a CP4 set up, to a CP3 set up. CP3, lines, fittings, hoses, clamps, adapter plate.
• Made from brand new CP3 pumps using the best practices and tooling in the industry you can be confident you're getting the best CP3 on the market for your truck.
• Backed by a 1 Year Unlimited mileage warranty against defects.
• The 12mm CP3 can support power above 1000hp with supporting mods.
• No Core Required.