Product Description
OVERVIEW
The PDM-LMMSTKLB GM PREMIUM STOCK PLUS LONG BLOCK is a premium replacement engine assembly built for direct-fit installation into GM 2007.5-2010 6.6L LMM Duramax trucks. This long block is engineered to OEM tolerances but includes upgraded internal components for improved durability and performance. It gives you peace of mind for heavy-duty use without the cost of a full crate engine.
FITMENT
Designed specifically for 2007.5-2010 Chevrolet Silverado and GMC Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax LMM engine. It preserves factory compatibility with wiring, sensors, accessory brackets, and transmission bellhousing patterns.
KEY FEATURES
- Built with upgraded forged steel crankshaft and high-strength rods
- Premium-grade pistons optimized for durability under load
- Balanced rotating assembly for smooth operation
- New high-quality bearings, rings, and fasteners
- Precision machined for proper oiling and cooling passages
- Includes new camshaft and lifters to maintain stock valve timing
BENEFITS
Compared to a stock long block swap, this Premium Stock Plus version gives you insurance against failures in high-stress or high-mileage applications. It's ideal for fleet use, heavy towing, or performance builds that retain factory compatibility.
WHAT'S INCLUDED
- Fully assembled long block (block, crank, pistons, rods, cam, lifters, bearings)
- Gaskets and seals for major passages (oil, coolant, front cover)
- New front cover and timing components (where applicable)
- Installation instructions and torque spec sheet
RECOMMENDED SUPPORTING PARTS
- GM Duramax Head Gasket Kit
- LMM Duramax Oil Pump
- LMM Duramax Water Pump
- LMM Main Bearing Kit
- LMM Oil Pan Gasket
- Gasket & Seal Sets (Duramax)
INSTALLATION NOTES
This long block is intended for professional installation. Reuse or replace all external components such as the oil cooler, fuel system, turbocharger, intake/exhaust manifold, injectors, valve covers, etc. Break in the engine gently and monitor oil pressure and temperature carefully during the first 500 miles.
FAQ
- Is this long block a direct bolt-in?
- Yes - for 2007.5-2010 6.6L LMM Duramax trucks. All mounting points, sensor ports, and accessory clearances are factory-patterned.
- Do I need to replace the heads?
- No. This is a long block; reuse your existing cylinder heads (after inspection) or upgrade separately if desired.
- Does it come with a warranty?
- Yes - subject to our standard warranty terms. Mileage limitations and proper break-in procedures apply.
- Can I use this for performance builds?
- Yes, though internal strength is upgraded for durability. For high-horsepower builds, consider matching with performance heads, turbo, injectors, and tuning.
- Is the engine delivered pre-lubed?
- Yes. We pre-lube internal bearings and prime the oil system to ensure safe start-up.
