Product Description

Industrial Injection PDM-LLYSTKSB GM Premium Stock Plus Short Block — Fits 2004.5–2005 LLY 6.6L Duramax

Refresh your LLY the right way. The Industrial Injection Premium Stock Plus Short Block (PDM-LLYSTKSB) is engineered to address common 6.6L Duramax bottom-end failure points while maintaining OE manners and drivability. Ideal for work, tow, and daily performance builds.

Fitment

• 2004.5–2005 Chevrolet Silverado 2500HD/3500HD — 6.6L LLY Duramax
• 2004.5–2005 GMC Sierra 2500HD/3500HD — 6.6L LLY Duramax

Why Choose Premium Stock Plus?

• Built by Industrial Injection for proven reliability on LLY platforms
• OE-style street manners; perfect foundation for mild upgrades
• Quality machining and components for long service life

What’s Included

• Assembled short block (no cylinder heads)
• Block, rotating assembly, and bottom-end components per Premium Stock Plus spec

Helpful Notes

• Core charge may apply. See product page details.
• Recommended to pair with new head gaskets and ARP 230-4201 head studs for best sealing.

Specifications

Recommended Parts (From CPP Diesel)

• Industrial Injection Reman Cylinder Heads (LLY)
• ARP 230-4201 Head Stud Kit (LB7/LLY/LBZ/LMM/LML)
• Industrial Injection Head Gaskets (Driver) & (Passenger)
• Exergy 10mm Stroker CP3 (LLY) or Bostech Reman CP3 (LLY)
• LLY Intercoolers & Piping
• Shop All GM Duramax Categories

FAQ

What’s the difference between a short block and long block?

A short block includes the assembled bottom end (block/rotating assembly). A long block adds cylinder heads and valvetrain.

Do I need tuning?

No special tuning is required for stock components. If you add injectors, turbo, or high-flow CP3, proper tuning is recommended.

Is there a core charge?

Yes. A refundable core charge typically applies when your rebuildable core is returned within the policy window.

Break-in recommendations?

Use conventional break-in oil for the first 500 miles with varied load and RPM; change oil & filter afterward.