Before choosing the best lift pump for you LML Duramax, it is important to understand why the LML trucks needs a lift pump and what it actually does for you.
What is a LML lift pump and how can it help? A factory Duramax LML fuel system uses an injection pump or CP4 to draw the fuel up out of the tank using vacuum to feed the injectors. This vacuum action can create air pockets and does not remove any water from the diesel fuel which in time can lead to CP4 failure. A electrical Fass Duramax LML lift pump has two canister style filters on the base of the LML lift pump. One of them is a 2 micron fuel filter and the other is a water and air separator that is capable of removing just over 99% of water and air in the fuel before its delivered to the injection pump. Also by installing the best lift pump for LML Duramax trucks the electrical power of the pump eliminates the vacuum action needs to deliver fuel from tank.
In 2011 the Duramax LML was introduced and ran production until 2016. The LML diesel is a great engine with enough power to pull a house down. Like any different generation of diesel engine there was one major fail component within the LML that can and most likely lead to complete engine failure. The CP4 injection pump, Duramax changed from the old reliable CP3 injection pump to a troublesome CP4 pump. This new pump especially early on showed signs of being very susceptive to air bubbles and water in the fuel causing the pump to fail and send metal shards to the injectors. If these shards made their way past the injectors to the cylinders BOOM complete engine Failure.
Why is Fass the best Duramax LML lift pump. Fass Fuel Systems built in Marthasville Missouri has perfected the process of eliminating the three major contaminates in diesel fuel. Water, dirt and air cause serious harm and the Fass LML lift pump solves all these issues. The water and air separator used on a Fass system is and has been tested to be the best in the diesel industry. Longevity is also another concern, the Fass pump has a premium motor to keep you on the road, Fass has less than a 2% failure rate on every fuel pump they build. Fass lift pumps are built in the USA and backed with a lifetime warranty.
In conclusion to save thousands on repairs and keep your LML on the road working for you its important to choose the best lift pump for LML Duramax engines and that choice is made easier by Fass Fuel Systems.