Introducing the D&J Precision Plus Long Block for the 2011–2016 6.6L LML Duramax
More complete. More upgrades. Ready to work.

CAMBRIDGE, OHIO — When we engineered our Precision Plus Reman Long Block, we didn't just rebuild the LML, we designed a complete 6.6L LML Duramax drop-in built to fix factory failures.
The 2011–2016 6.6L LML Duramax are great trucks, but stock weakness, like head gasket failures, gear slippage, and high oil temperatures, can put a premature end to your build or work day.
Why choose the Precision Plus Reman Long Block for your Duramax?
Maximum Clamping Power: Standard ARP head studs paired with Tier 1 MLS gaskets eliminate head gasket failure under heavy tow loads.
Positive Mechanical Locking: Keyed crankshaft, keyed camshaft, and a pinned oil pump mean zero gear slippage or timing loss.
Cooler Oil Temps: We upgraded the thermal management system with a high-flow L5P Duramax oil cooler.
The Full Package: Includes rocker assemblies, valve covers, intake manifold, balancer, flywheel, and flex plate. Less time swapping old parts over & fewer hours in the shop.
Specifications:
Fitment: 2011–2016 Chevrolet Silverado & GMC Sierra HD 2500/3500 (6.6L LML Duramax)
Starting Price: $13,499.99
Best For: You need a reliable, complete replacement to save time and labor. No need to use old parts.
Backed by our D&J Precision Machine Warranty
These long blocks give Duramax owners access to the D&J quality and reliability that Cummins owners have relied on for years. Our new Duramax engines come with a 24-month labor warranty and a 24-month or 100,000-mile parts warranty.
Orders are officially open.
About D&J Precision Machine
D&J Precision Machine is located at 706 Woodlawn Avenue, Cambridge, OH 43725. For more information, visit djprecisionmachine.com.
Media contact
D&J Precision Machine, 706 Woodlawn Avenue, Cambridge, OH 43725, 740-297-7223This release was issued by D&J Precision Machine and is republished here with a link to the original. Brand representatives can request an edit or removal.


