123 products

LLY Duramax | 2004.5–2005

Shop parts for 2004.5–2005 GM trucks equipped with the 6.6L LLY Duramax. Browse injectors, fuel system components, turbo and intake upgrades, cooling system parts, engine components, transmission upgrades, maintenance items, and performance parts selected for LLY applications. Always verify your exact year, model, and product fitment before ordering.

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Diesel parts guide

Shopping LLY Duramax | 2004.5–2005

Hilltop Diesel Performance organizes parts around real truck fitment so you can move from platform to the component you need without digging through an unrelated catalog. For Duramax applications, start with your exact year and engine, then verify configuration-specific notes on the product page before ordering.

Common upgrade and service paths include fuel delivery, injectors, turbochargers, intake and charge-air parts, exhaust, cooling, transmission components, filtration, sensors, gaskets, hardware and supporting installation parts.

Fuel systems Injectors Turbochargers Intakes Exhaust Cooling Transmission Get fitment help