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Please help! Multiple Fault codes on my 2016 GMC Sierra Denali


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Posted

Hi,

 

I have multiple codes on my truck. It happened just all sudden when I was driving and the ABS, traction, and brake lights came on. I am also getting error messages on the display screen as following

- Trailer Brake System

- Stabiltrak off

- Park sensor off

- Power Steering has been reduced

 

I have a Launch X431 device and here are the faults that I am getting. I am noticing that U0121 is repeated in most of the modules. 

What could be causing this? Faulty wires? Faulty module (s)? Is there anyway I can find a wiring diagram so that I  can test voltages and figure out where the fault is starting from?

 

 

 

 

 

 

WhatsApp Image 2020-08-09 at 5.18.58 PM (2).jpeg

WhatsApp Image 2020-08-09 at 5.18.58 PM (1).jpeg

WhatsApp Image 2020-08-09 at 5.18.58 PM.jpeg

WhatsApp Image 2020-08-09 at 5.18.57 PM.jpeg

WhatsApp Image 2020-08-09 at 5.18.56 PM.jpeg

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