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Ouis M. Mouffok

2017 Chevy Colorado 2.8 Duramax Z71 DEF Failure

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Dears, 

I bought my 2017 Chevy Colorado Duramax Z71 brand new and I just love it. I was super satisfied with the performance and features of the truck. Due to the nature of my job, I had to move outside the U.S for a long mission to Africa, so I took my truck with me. Here started my nightmare. Just few days of use, I had the famous warning message regarding the quality of gas (DEF). I changed several brands of DEF but no success! I read somewhere that the shelf life of the product is key for the quality of the fluid. Now my truck is kind of locked, I am allowed to drive 6 Miles/h, it means it is not working. The worse thing is that there is no GM, Chevrolet store to assist. I was thinking to delete the whole DEF system if possible since the location where I am based is not regulated by the gas emissions. I will be very grateful if you could assist as I am suffering without my car. Thanks for your help.

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Are you sure it’s related to the quality of the DEF?  You need to get a code reader and plug into your truck and see if there are any other codes present. It may take calling a GM dealership and ordering some DEF directly from them and shipped to your location.  If you can, siphon or drain out the DEF that is currently in the truck so you are not diluting down bad DEF with good DEF, if that’s indeed the problem.

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Better get it deleted and tuned.  Maybe a GDE tune would be your easiest remedy.  

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