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The Duramax LML is a 6.6 litre V8 turbo diesel, overhead valve with four valves per cylinder and Bosch common rail injection. General Motors ran it from 2011 to 2016 in the Silverado and Sierra 2500HD and 3500HD, behind the Allison 1000 six speed. Nothing under the Duramax LML here bolts to the engine: the 3 parts are all Allison driveline hardware.
Allison clutch pack for the LML
The Allison HD C4 GPZ Torqkit clutch pack covers 2011 and later trucks. GPZ friction material is a step up on the standard plates for a tuned or towing LML. Check which clutch pack you are replacing before ordering, since the Allison 1000 uses several and they are not interchangeable.
Billet output shaft for the LML
A TCS billet output shaft is listed for 4WD trucks from 2011 to 2019. That shaft is a strength upgrade rather than a service replacement, so it suits a tuned or heavily loaded truck. Everything on this page is fitted at Oxley or Warana as well as shipped.
Transmission cooling for the Duramax-LML-11-15
A Fluidyne heavy duty transmission cooler is the third line here, catalogued for 15-16 trucks even though the term reads 11-15. The LML drives its camshaft off a gear train, so there is no timing belt or chain in the picture.
