Product Description
Industrial Injection PDM-LLYRSB GM Race Short Block — Fits 2004.5–2005 6.6L LLY Duramax
Build your LLY the right way. The Industrial Injection PDM-LLYRSB Race Short Block is purpose-built for high horsepower 6.6L Duramax applications that demand strength, reliability, and precision clearances. Assembled by diesel performance experts, this short block is a rock-solid foundation for compound turbos, big single setups, competition towing, and weekend warriors alike.
Key Features
- Fully machined LLY 6.6L Duramax block, cleaned, inspected, and decked
- Performance-balanced rotating assembly (crankshaft, rods, pistons)
- Race pistons with performance ring pack and pin fitment
- Precision main and rod bearing clearances set for high-load use
- Rear main seal installed; front cover doweled and ready for assembly
- Assembled in the USA by Industrial Injection
Fitment
GM 6.6L LLY Duramax — Model Years 2004.5, 2005 (mid-2004 “LLY” through 2005). Typical chassis:
- 2004.5–2005 Chevrolet Silverado 2500HD/3500 — 6.6L LLY
- 2004.5–2005 GMC Sierra 2500HD/3500 — 6.6L LLY
What’s Included
- Fully assembled short block (block, crank, rods, pistons, rings, bearings)
- Rear main seal installed
Heads, gaskets, front cover, oiling system components, camshaft/valvetrain, and external accessories are not included unless noted.
Recommended Supporting Upgrades
- ARP Head Studs for reliable clamping under boost
- Duramax Head Gasket Set (LLY)
- High-Volume Oil Pump and Oil Pan
- Industrial Injection Injectors & Fuel System Components
- Performance Turbocharger (LLY)
- Performance Camshaft & Lifters
- Custom Tuning to optimize fueling & timing
Why Buy From CPP Diesel?
CPP Diesel is your one-stop Duramax specialist with the parts, knowledge, and support to help you hit your power goals. Pair this short block with our curated Duramax LLY components for a proven combo.
Specifications
| Brand | Industrial Injection |
|---|---|
| Part Number | PDM-LLYRSB |
| Engine | GM 6.6L LLY Duramax (2004.5–2005) |
| Configuration | Assembled Race Short Block (rotating assembly installed) |
| Intended Use | High performance / racing / heavy towing with proper supporting mods |
| Core Charge | May apply; see Core Return Policy |
| UPC | Pending (contact us for current UPC) |
| GTIN | Pending (contact us for current GTIN) |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
Frequently Asked Questions
Do I need head studs with this short block?
Yes, we strongly recommend ARP head studs for boost control and sealing reliability.
Is tuning required?
Absolutely. Any build using upgraded fuel and air should be paired with quality LLY tuning to optimize power and longevity.
Will this fit my 2006 LBZ?
No. This part is for the LLY (2004.5–2005). For other model years, browse Duramax engine parts by year/engine code.
What else should I replace during installation?
We recommend a complete gasket set, oil pump, oil cooler, water pump, and fresh sensors to protect your investment.
Is there a break-in procedure?
Yes. Use conventional break-in oil, vary RPM/load, and follow the builder’s guidelines. Contact us for specifics tailored to your setup.
Need help planning your build? Our team can recommend a complete parts list for your power target and use case.
