How To Prevent Duramax ECM Crashing

Happen to be building a 2001-2004 LB7 project and worried about potential Duramax ECM issues? Not to worry, WDP has you covered with this article helps you make the right decisions when it comes to LB7 tuning. ECM tuning is nothing new, and the aftermarket has really taken off when it comes to mail order tunes and dyno tuning in general.

If you are new to LB7 modifications or are not sure what Duramax ECM problems you could face? Well, between the year ranges of 2001 - 2004 (LB7) or 2004.5 - 2005 (LLY) , the Duramax ECM in the truck could potentially crash during a tune.

In fact, a simple browse through many of the diesel truck forums will reveal that these crashes are susceptible for the LB7 and LLY ECMs. So, interested in tuning your Duramax ECM but not sure how to get there? Check out these handy tips to preventing Duramax ECM crashes.

Duramax ECM

How to Tune your Duramax ECM

Let's cover the basic tips when it comes to modifying your Duramax ECM or any ECM really for that matter.

  • Ensure that your truck batteries are at full charge
  • Disconnect all aftermarket electronics
  • Add additional temporary grounds to your engine / chassis
  • Flash your truck at home or a local garage

These simple steps can help you avoid the common mistakes that many owners commit when tuning their Duramax ECM. Flashing your truck from the comfort of your own garage can save you valuable time and an expensive tow bill.

Why Duramax ECM crashes occur

Although many of the Duramax ECM crashes are avoidable, many owners still commit these mistakes. Preparing to tune your Duramax? Want to know how you can properly prep for the big jump? Let's take a look at why these Duramax ECM crashes occur, and the steps you can take to safeguard yourself.

Communication Disruptions - One of the biggest causes of Duramax ECM crashes, this can often occur due to battery issues, ground issues or aftermarket electronics. Should you have an existing aftermarket OBDII tuner, scanner or similar device, it could interrupt the CAN BUS signal and communication to your Duramax ECM. 

This can cause serious issues, either with the ECM being flashed midway and resetting, or losing a tune altogether. Prevent this from happening by taking the proper measures to disconnect and remove all of your aftermarket electronics from your Duramax.

Maintain Voltage - Batteries are a huge culprit to the ongoing Duramax ECM crashing issue. Before you tune your Duramax, you should always make sure that your truck has a proper charge in both batteries. Should your battery voltage dip below acceptable levels, either while cold cranking or something else, you are going to have Duramax ECM problems.

This is especially true if you happen to live in a cold climate. So before you flash your Duramax, make sure to take the proper precautions. 

Get help - Whether it's from a local group of friends or tuners, or a local shop it's never a bad idea to plan for the worst. This also extends to common sense as well, for instance, if you plan on towing your trailer for a family vacation tomorrow, don't flash the truck the night before.

Still have questions about the Duramax ECM or Duramax tuning? Contact the experts at WDP by giving us a ring at (385) 202-7360 or subscribe to our Facebook page here.

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