4 Reasons And Their Solutions Behind The U1064 Duramax Error Code

What does u1064 duramax mean? This error code means that the communication is lost with body control module (BCM). The lost communication can happen between the BCM and the transmission control module (TCM) or the BCM and the powertrain control module (PCM).

When searching for the reasons behind the u1064 error code, we find out that the reasons are a faulty BCM, low batteries, bad grounding on BCM, etc.

Let’s check all these reasons and their solutions elaborately in this guide.

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U1064 Duramax

The u1064 code is set when you see that body control module identifies a voltage shortage on the door lock actuator lock/ unlock control circuit.

This code can also be set when the BCM identifies a voltage shortage on the driver door lock actuator unlock control circuit for above 150 msec.

So, have a quick view of all the possible reasons and know the symptoms.

Probable Reasons	Symptoms
A faulty body control module	The truck will start and then stop 3 seconds later
Low batteries	Radio, door locks, security lights, and dashboard lights will not work
Bad grounds on BCM	The transmission fluid temperature gauge is not working
A bad ignition switch	The odometer display will not work

In the below guide, you will find out the 4 reasons and their solutions in detail of the u1064 code Duramax.

A Faulty Body Control Module

A faulty body control module is the most common reason behind the u1064 error code. There can be a defect inside the board of the BCM, which can cause this error code as well. The heat of the BCM can cause this defect.

When you see the u1064 error code in your 2006 LBZ Duramax engine, you will also see that your truck will start and then stop 3 seconds later. After that, it will not start again.

Solution: In this case, you need to replace the faulty body control module to solve this issue.

Low Batteries

Suppose you see the u1064 error code on your 2004 Chevrolet Silverado 2500 HD Duramax truck. In that case, it can happen for low batteries in your truck. You will also see the door locks, dashboard lights, and security lights are not working in this case.

In addition, it might happen that the radio cannot be turned off at first, and when it finally turns off, it won’t turn back on.

Solution: To solve this issue, change the batteries of your truck. Also, make sure that the batteries are over 13 volts all the time so that this error code doesn’t come back in the future.

Bad Grounds On BCM

Sometimes, you can get the u1064 error code on your 2003 GMC Sierra 2500 HD SLT 6.6 Duramax crew cab. When you get this code, you will find out that the transmission fluid temperature gauge is not working. It happens mainly for bad grounds on BCM.

However, this error code can also appear for faulty grounds on the EBCM, transfer case, and instrument panel.

Solution:

In this case, you have to clean all the ground locations of the BCM, EBCM, transfer case, and instrument panel to solve this problem.

A Bad Ignition Switch

We found out that many people have complained that they get the u1064 error code on their 2013 GMC Sierra 2500 HD Duramax truck. They also complained that the odometer display did not work when they got this error code. This problem occurs because of a bad ignition switch.

Solution: To solve this issue, you have to replace the bad ignition switch.

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Frequently Asked Questions (FAQs)

What is a U1064?

A U1064 is a trouble code or error code of a vehicle. It means that the communication with the dash integration module (DIM) is lost, which is generally caused by a loss of power to the BCM. The U1064 error code can appear for a faulty body control module, an ignition switch going bad, low batteries, and bad grounds on BCM.

How to fix the u1064 Duramax error code?

To fix the u1064 error code, you mainly need to replace the body control module of your vehicle. It is because the most common reason behind the u1064 error code is a defective control module. Other fixes are changing the batteries, replacing the ignition switch, and cleaning all the ground locations of the BCM, EBCM, transfer case, and instrument panel.

Conclusion

Finally, it is fair to say that fixing the u1064 error code is a difficult task. The U1064 error code seems to be a sort of network problem as the “U” codes are generally network codes. There are many reasons behind this error code. Knowing them and solving them is the most difficult task you will face.

In this article, we have come up with the 4 reasons and their solution behind the u1064 Duramax to help you. We are hopeful that after knowing these reasons and solutions, you can now easily fix this error code.

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4 Reasons And Their Solutions Behind The U1064 Duramax Error Code