Not really sure what code U1064 is and how to fix. I have owned my 04'trailblazer for 3 years now and outside of the general maintenance I haven't really had any problems with it. The insterment cluster was starting to go when I bought it and now the only thing that works is the speedometer. Would the insterment cluster have anything to do with the multiple codes showing up?
I haven't seen the Instrument Cluster setting the U1064. The most common problem that will set the code is the Body Control Module (BCM)
U1064 CHEVROLET - Lost Communications With Body Control Module Read more: https://www.autocodes.com/u1064_chevrolet.html
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