Hi, i recently converted my 2015 Sierra from a HMI 2 to a HMI 2.5 and a matching radio unit to have Android auto enabled. All went well, but now microphone is not working anymore. I've read that UE0 (onstar delete) truck needs a special programation. I have SPS2 access (dealer level) and DPS if needed. Can anyone help with this? I've seen codebuilder's posts where he was able to help other members with similar issue on a Impala. If anyone can help i'll gladly pay to be a contributor

There's a few flags in there for the non-onstar ones. Do you have a set of HMI calibrations that you've loaded? If so, put them here and I'll see if I can flip the flags for you.