The Pureflow AirDog II-5G 165 GPH A7SABC510 Air/Fuel Separation lift pump, or Fuel Preporator, is the top must have upgrade for your 2011-2014 LML Duramax. The diesel fuel system on your LML is the heart of the vehicle’s performance and reliability. This low pressure (preset at 8-10 psi) LML lift pump mounts in front of the fuel tank to the frame jig. The pressure side feeds the CP4 injection pump through the factory feed line on the frame. The suction/fuel supply side hook directly up to the factory quick disconnect fittings and the air/apor return is sent back to the tank through a filler neck tee making the install very straight forward. Due to the fact the Duramax does not have a factory lift pump, these trucks usually see the most benefit from an AirDog lift pump fuel system. (see How It Works)
The II-5G features a fully adjustable (7-55psi) integrated diaphragm pressure regulator. This regulator offers more consistent fuel pressure and allows for higher flow rates at pressure. It can also be boost compensated to battle any pressure drops under open throttle (boost compensation kits sold seperatley). The 5G also includes an updated 12 gauge wiring harness with Metri-pack 280 connectors.
Over the life of your diesel pickup truck there may be unnecessary stress on the fuel system. High mileage and/or additional performance modifications such as a tuner or over size injectors may weaken your injection pump, or CP4, in a shorter amount of time than with the stock fuel system. As a result, your performance, reliability, and fuel economy may suffer. However, by installing an AirDog II-5G lift pump, you will strengthen, protect, and in most cases extend the life of your fuel system and related parts. The supplied fuel filter (FF100-2) and water separator (WS100) filter your fuel down to a 2 micron rating, which surpasses the stock fuel filters filtration capability.
The AirDog 2 5G will also help your truck by eliminating spray pattern disruption from air entering your diesel fuel system. The result is overall increased engine efficiency by keeping the injection timing where it should be thus allowing a more complete burn of the fuel entering the cylinder.