Product Description
Industrial Injection PDM-LLYSH Remanufactured Cylinder Heads – 2004.5–2005 LLY 6.6L Duramax
Restore factory sealing, flow, and reliability on your LLY with Industrial Injection PDM-LLYSH remanufactured cylinder heads. Each head is professionally remanufactured to precise specifications, pressure-tested, and surfaced for MLS gasket compatibility—making it the perfect solution for stock to moderately upgraded builds.
Key Features
- OEM casting, remanufactured to stringent tolerances
- Magnaflux inspected & pressure-tested for cracks/leaks
- Precision resurfaced for MLS gasket sealing
- New valve stem seals; valves, guides & seats inspected and serviced
- Injector bores/cups verified; threads chased and repaired as needed
- Assembled, ready for install (swap over rockers/bridges where applicable)
Fitment
- 2004.5–2005 Chevrolet Silverado 2500HD/3500HD – 6.6L Duramax LLY (VIN 2)
- 2004.5–2005 GMC Sierra 2500HD/3500HD – 6.6L Duramax LLY (VIN 2)
Note: A refundable core charge may apply. Please see our core policy and shipping instructions.
View Core Policy | Shop All Duramax Parts | Shop Industrial Injection
Recommended Installation/Related Parts
- LLY Head Gasket Set (MLS)
- ARP Head Stud Kit – Duramax
- Injector Seal/Install Kit – LLY
- Rocker Box/Cover Gaskets – LLY
- Upgraded Water Pump – Duramax
- Thermostats (Pair) – LLY
- EGR/Intake Gaskets – LLY
Specifications
| Brand | Industrial Injection |
| Manufacturer Part # | PDM-LLYSH |
| Engine | 6.6L Duramax LLY (VIN 2) |
| Years | 2004.5–2005 |
| Condition | Remanufactured |
| Core Charge | Yes – refundable (see core policy) |
| UPC | To Be Assigned |
| GTIN | To Be Assigned |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
FAQ
Q: Do these heads come fully assembled?
A: Yes. They are remanufactured and assembled with valves and new seals. You will typically reuse/transfer rocker assemblies and bridges unless otherwise noted.
Q: Are these compatible with MLS head gaskets?
A: Absolutely. Each head is precision surfaced for MLS gasket sealing.
Q: Do I need tuning after installing reman heads?
A: Not for a stock-equivalent replacement. Any existing performance tuning remains unchanged.
Q: What torque specs should I use?
A: Follow factory procedures for LLY 6.6L. If using head studs, use the torque sequence and specs supplied with the stud kit.
Q: Is there a core charge?
A: Yes. A refundable core charge applies. Return your rebuildable LLY head(s) per our core policy.
Q: Warranty?
A: Backed by the manufacturer’s limited warranty against defects in materials and workmanship. See product packaging and CPP Diesel terms for details.
