Product Description
Airdog II-5G DF-100-5G for 2001–2010 GM Duramax 6.6L (LB7/LLY/LBZ)
The AirDog® II-5G DF-100-5G (100 GPH) is a complete frame-mounted lift pump and fuel air separation system engineered for the 2001–2010 Chevrolet/GMC Duramax 6.6L LB7, LLY, and LBZ. It removes entrained air and water, delivers consistent fuel pressure, and helps protect injectors and CP3 by feeding clean, steady fuel under load, towing, and daily driving.
Vehicle Fitment
- 2001–2004 GM Duramax 6.6L LB7
- 2004.5–2005 GM Duramax 6.6L LLY
- 2006–2007 GM Duramax 6.6L LBZ
- Also commonly used on chassis that retain LB7/LLY/LBZ fuel routing through 2010 when applicable (verify before ordering)
Key Features
- 100 GPH flow, integrated diaphragm-style fuel pressure regulator
- Air/vapor separation with return-to-tank for consistent, smooth fueling
- High-efficiency filtration with water separation to protect injectors
- Frame-rail sandwich-plate mount for clean, serviceable install
- Direct connection to OEM suction and feed lines for a tidy plumbing layout
What’s In The Box
- AirDog II-5G DF-100-5G pump assembly (A7SPBC259)
- Mounting bracket & hardware
- Fuel filters/water separator (as supplied by AirDog®)
- Vehicle-specific hose & fittings kit
- Wiring harness, relay, and instructions
Cross-Reference / Alternatives (Airdog Only)
- Need more flow for higher power? See the 165 GPH upgrade: AIRDOG A7SABC509 II-5G DF-165-5G (2001–2010 Duramax)
- Max effort builds: AIRDOG A7SABC512 II-5G DF-220-5G (2001–2010 Duramax)
- Prefer the 4G series for this platform? AIRDOG A4SPBC188 FP-150-4G (2001–2010 Duramax)
Installation Instructions
Download the official PureFlow AirDog® installation manual here: AirDog® Install & Resources Library
Why Buy From CPP Diesel
- Curated Airdog catalog for diesel enthusiasts—no fluff, just the right parts
- Fast shipping options and expert support
- Secure checkout and hassle-free returns policy
FAQ
What’s the difference between DF-100-5G, DF-165-5G, and DF-220-5G?These indicate the pump’s flow rating (100/165/220 GPH). Choose DF-100 for stock to mildly tuned trucks, DF-165 for larger injectors/tunes and regular towing, and DF-220 for high-horsepower builds. Match flow to your power goals for best pressure stability.
Does this replace my factory filter housing?
The II-5G mounts on the frame and feeds the injection pump with regulated, de-aerated fuel. It is commonly plumbed to bypass parts of the factory filter housing; follow the model-specific instructions provided by AirDog®.
Is any tuning required after installing the II-5G?
No tuning is required for installation. However, if you’ve changed injectors, turbo, or added power, ensure your fuel system (flow and pressure) matches your setup.
Will this help my CP3 and injectors last longer?
Providing clean, air-free fuel at stable pressure reduces cavitation and helps protect high-pressure components, which can improve longevity and drivability.
What maintenance is required?
Replace the water separator and fuel filter at the intervals recommended by AirDog® (or sooner in harsh conditions). Check hoses, clamps, and wiring during routine services.
Specifications for airdog A7SPBC259
| Attribute | Value |
|---|---|
| Brand | AirDog (PureFlow AirDog) |
| Part Number | A7SPBC259 (II-5G DF-100-5G) |
| UPC | 813094015597 |
| GTIN | 00813094015597 |
| Flow Rating | 100 GPH (DF-100-5G) |
| Shipping Method | Ground |
| Package Dimensions | 19.6" x 13.4" x 8.3" (approx.) |
| Shipping Weight | Not specified |
| Prop 65 Warning | This product can expose you to chemicals including diesel engine exhaust, known to the State of California to cause cancer and birth defects or other reproductive harm. See www.P65Warnings.ca.gov. |
