michaelsteel2

Blazer MOST Bus Fault

I'm having a problem with my 2020 Chevrolet Blazer with a gasoline engine. It has about 130537 kilometers on it. I'm getting a MOST bus fault, and there's no audio output at all. The audio system is dead, and the navigation isn't working either. There's also an error stored in the system. It looks like one of the control units on the MOST bus might be bad. Has anyone else run into this?

A 2020 Chevrolet Blazer is experiencing a MOST bus fault, resulting in a complete failure of the audio and navigation systems. The issue is suspected to be caused by a defective control unit on the MOST bus network. It is advised to have a professional technician diagnose and repair the problem, as the complexity of the MOST bus system requires specialized equipment and expertise.

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4 comment(s)

I had a similar issue with my Blazer; the whole audio and nav system just died. Have you checked the connections to the amplifier? It's usually the first thing to go when there's a MOST bus problem. Could also be a faulty module somewhere on the bus network messing things up.

Thanks. Could you give me more details about which amplifier connections I should check? Also, were you able to fix it yourself, or did you have to take it in?

I tried fiddling with the connections, but honestly, the whole MOST bus thing is pretty complex. I didn't want to risk messing something up further. Ended up taking it to a workshop. They diagnosed it to a faulty module on the MOST bus that was causing all sorts of communication errors. Best to get it checked by a professional.

I appreciate the advice. I'll set up an appointment with a technician to check out the MOST bus fault. I know these faults can be hard to fix without the right equipment. A diagnostic showed that a control unit on the MOST bus was defective, and the repair cost about 1000€.

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CHEVROLET

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BLAZER