Diesel Tuner's Blog

3 Tips to Prevent 2001-2005 Duramax ECM's From Crashing!

[fa icon="calendar'] Feb 9, 2018 2:00:00 PM / by Paul Wilson posted in lly performance, LB7, LLY TCM Tuning, LB7 TCM Tuning

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What crashes an LB7 and LLY ECMs?:

If you have a 2001 - 2004 (LB7) or 2004.5 - 2005 (LLY) Duramax and have been thinking about tuning it, this article is for you. 

As you're probably aware, ECMs have some small risk of crashing during a tuning flash.  Browsing the forums online you definitely already picked up on the fact that the LB7 and LLY ECMs are more suscepitble to the issue.

To make sure you aren't stuck stranded somewhere far from home follow these tips: 

  • Disconnect all aftermarket electronics
  • Make sure your batteries are at a full charge
  • Flash your truck at home or a local garage
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5 Essential LLY (2004.5 - 2005 Duramax) Upgrades!

[fa icon="calendar'] Dec 7, 2016 11:17:45 AM / by Paul Wilson posted in LLY Tuning, LLY Mods, lly performance, LLY Intake, LLY

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Essential 2004.5 and 2005 Duramax Upgrades

 

 

LLY is the code used for Duramax motors used in 2004.5 and 2005 HD trucks.  Although they introduced improvements from the 2001-2004 on the LB7 motor, there are a few essential upgrades every owner should consider.  (That is assuming an LLY owner would want more power, lower EGT's and better efficiency.)

Before diving into the pitfalls of an LLY, here are a few of the improvements brought to market when they were released.

  • Injectors outside of the heads provided much easier replacement
  • Improved injector design much more reliable than its predecessor 
  • Variable Vane Turbo technology provides better spool up and wider power band
  • Largest frame turbo of any Duramax motor to date

After years of testing this motor and countless upgrades, there are at least 5 essential upgrades every LLY could use.

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Top 3 mods for your LLY Duramax

[fa icon="calendar'] Jan 11, 2016 8:30:00 AM / by Paul Wilson posted in Insider, Duramax Performance, Mods, LLY Tuning, better mpg for lly, how to get better fuel mileage with LLY, LLY Mods, dsp, dsp5, lly performance, DuramaxTuner.com, LLY Intake, EFILive, efi live, switchable tuning, LLY, duramaxtuner, Modifications, What should i do first, what tuning should i get for my LLY, Duramax, switch on the fly tuning, LLY mpg

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  • The LLY Duramax  is a great truck from the factory for there are 3 modifications every owner should make! The LLY was manufactured 2004.5 and 2005. There are a few 2006 models that are labeled as an LLY, however they have all of the LBZ upgrades from the factory, so for performance applications consider those an LBZ. An LLY was the first Duramax with the injectors outside of the heads, a variable vane turbo and a 50 state EGR.

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