Product Description
Overview: The AirDog® Raptor-4G RP-150 (P/N R4SBC139) is a 150 GPH frame-mounted lift pump engineered specifically for the 2015–2016 GM 6.6L Duramax LML. It mounts cleanly to the frame bracket ahead of the fuel tank, draws through the OE suction fitting, and feeds the injection pump with a steady, de-aerated fuel supply. Internally regulated design means no return line required for a clean, reliable install.
Vehicle Fitment
- 2015–2016 Chevrolet Silverado 2500HD/3500HD — 6.6L Duramax LML
- 2015–2016 GMC Sierra 2500HD/3500HD — 6.6L Duramax LML
Key Features
- 150 GPH flow for stock-to-moderately modified LML builds
- Internally regulated; no return line required
- Quiet 4G motor design; smooth operation
- Direct-feed plumbing to the injection pump to reduce aeration/cavitation
- Complete kit with pump, bracket, hoses/fittings, wiring (see manual)
Cross-Reference / Alternatives (Airdog on CPP Diesel only)
- AIRDOG R4SBC138 RP-4G-100 (2015–2016 LML) — 100 GPH option
- AIRDOG A4SPBC191 FP-150-4G (2015–2016 LML) — original AirDog with filtration & return
- AIRDOG A7SABC513 II-5G DF-165-5G (2015–2016 LML) — 165 GPH, 5G platform
- AIRDOG A7SABC515 II-5G DF-220-5G (2015–2016 LML) — 220 GPH for high-hp builds
Installation Instructions
- AirDog Installation Manual (RP-4G Duramax 2015–2016): Download PDF
- Browse the full AirDog resource library for the latest manuals: pureflowairdog.com/resources
Helpful Notes
- Mounts to the frame standoff in front of the tank; uses OE suction fitting and feeds the injection pump on the frame rail.
- Designed for moderately modified trucks; for heavier fueling demands, see II-5G alternatives above.
FAQ
Will this work on a stock LML?Yes. RP-4G-150 supports stock and moderately tuned trucks while improving supply to the injection pump for smoother, more reliable fueling.
Do I need to run a return line?
No. The Raptor-4G is internally regulated and does not require a return line, simplifying the installation.
What base pressure should I expect?
Typical setups run in the single-digit to teens PSI at the injection pump feed; consult the install manual and your tuner for target pressure on your build.
Is there a more filtration-focused option?
Yes — consider the original AirDog FP-100/FP-150 4G systems (e.g., A4SPBC191 above) or the II-5G series for integrated filtration and adjustable regulation.
Specifications for airdog R4SBC139
| Brand | AirDog (PureFlow) |
| Part Number | R4SBC139 (RP-4G-150) |
| Engine Compatibility | 2015–2016 GM Duramax 6.6L LML |
| Flow Rate | 150 GPH |
| UPC (GTIN-12) | 813094012398 |
| GTIN-13 | 0813094012398 |
| GTIN-14 | 00813094012398 |
| Package Dimensions (W × H × D) | 13.50 in × 7.00 in × 12.00 in |
| Shipping Method | Free Shipping (contiguous U.S.) |
| Country of Origin | Not specified |
| Prop 65 Warning | Not specified by manufacturer |
