I just registered here on DP. I have a new 05 with D/A. I love the truck, everything seems perfect. My truck has a build date of 10/04. Is this the LLY motor? What are the differences between LLY and LB7. Thanks.

Yes, LLY motor.

Cat Converter, better injectors, egr valve & designed to run on the new ULS fuel (Ultra Low Sulfur) the LLY is.

And Welcome Aboard!

You came to the right place to find the answers you seek!

Welcome Sandstone!

Your 2005 LLY Duramax also has a variable geometry/vane turbo (VVT), which it is said helps the LLY make more than 600ft/lbs of torque aside from the benefit of lower emissions. Your stock LLY is rated at more power than the stock LB7s.

The engine also has a better design for the heads allowing the replacement of the injectors, God forbid, to be facilitated with greater ease.

You've got fast-heating glow plugs; a different overall fuel system and fuel management system; a revised cooling system; and a different engine cover designed to reduce noise.

Welcome to the DP family. JJ :)

Here in Michigan, LLY owners can appreciate the high idle option for faster warm-ups.

Thanks for all the info, I am a former ford 6.0 PSD owner. That truck had to go! My new D/A is awsome.

Some things do improve with Age: Wine, Cheese, D/A's :cool: and some of the more Mature Drivers/Owners :driver:.


:welcome2: aboard.

Idahofox