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[Solved] GMC SIERRA DENALI 2500HD 6.6 DURAMAX RANDOMLY SHUTS DOWN WHILE DRIVING

  

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Hi!, PLEASE help me with this. My Truck is giving me a hard time. While driving, the truck suddenly shuts down the engine and the locks open and close, and the engine starts again (the ABS dash light goes on and off while this is happening). The only error its giving on OBD is "communication error".  I already replaced the ABS module and valve and still shutting down.  The truck is in the dealer service since December 2021, and the mechanic has checked everything... he thought that it may be the wire harness, but apparently they are fine... he now is telling me that is the computer... I'm very upset.. and without my truck! Hope you can help me!!!


I forgot to mention… It’s a diesel engine.


2 Answers
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Check all grounding connections on these trucks, especially the main one to the frame under the drivers side door.  They are famous for corroding and causing problems. 


Why the down vote @waldogonzalez?


1

Have you seen this?

https://www.duramaxforum.com/threads/2012-shuts-off-while-driving.1006018/


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