Product Description
Restore or increase fueling on your LLY the right way. The INDUSTRIAL INJECTION 0986435504SE-R3 is a premium, remanufactured common-rail injector for the 2004.5–2005 6.6L LLY Duramax. Each unit is precision-calibrated and flow-benched, with options for 27 LPM (near-stock output) or 29 LPM (mild performance headroom) to support clean power and smooth balance rates.
Fitment
- 2004.5–2005 GM 6.6L LLY Duramax (Silverado/Sierra 2500HD/3500)
- Direct replacement common-rail injector for LLY engines (VIN code 2)
What’s Included
- (1) Remanufactured injector, calibrated and flow-tested (choose 27 LPM or 29 LPM)
- New external seals/O-rings and crush washer
- Installation instructions & test report (typical)
Why Choose This Injector
- Tight balance rates for smooth idle and drivability
- High-quality components replaced during reman (seals, nozzle wear items)
- Flow options to match your goals: 27 LPM (OE-like) or 29 LPM (mildly higher fueling)
- Direct fit for LLY rails/lines—no tuning required for 27 LPM; 29 LPM may benefit from mild calibration
Recommended Parts (CPP internal links)
- Shop All GM Duramax Parts
- Fuel Injectors & Install Accessories
- High-Pressure Fuel Lines (Recommended when replacing injectors)
- Fresh Fuel Filter(s) for proper break-in and protection
- CP3 Pump & Supply Upgrades to maintain rail pressure under load
Installation Notes
- Cleanliness is critical—cap open lines/ports and work on a debris-free surface.
- Always code injectors (if applicable) and verify balance rates after install.
- Prime the fuel system thoroughly to prevent dry-start damage.
- Replace any suspect high-pressure lines and return hoses to avoid leaks or aeration.
Core & Warranty
- Core charge applies. Return an acceptable LLY injector core in the original packaging for credit.
- Keep your receipt and test tag for any warranty evaluation.
FAQ
What’s the difference between 27 LPM and 29 LPM?Both are calibrated reman units. 27 LPM closely matches stock flow for OE drivability, while 29 LPM provides a touch more fueling headroom for mild tuning or supporting bolt-ons.
Do I need tuning?27 LPM typically runs on stock calibration. 29 LPM may benefit from a mild calibration to optimize idle and smoke control, especially with other mods.
Should I replace high-pressure lines?It’s strongly recommended. Old lines can shed debris or fail to seal after multiple torque cycles; fresh lines help protect your new injector.
Is a single injector okay or should I do a set?A matched set ensures the tightest cylinder-to-cylinder balance. If replacing one for a failure, verify balance rates afterwards and plan a set if numbers remain out of spec.
