This was a common issue on these vehicles back then. So, GM released a service bulletin to fix this after a battery disconnect.
I would like to say this is a very complicated and detailed procedure, but they literally have you put a paper clip in through the trip reset button and move the needle so that it gets on the other side of that notch.
Please see below and let us know if you have other questions. Thanks
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Sunday, October 10th, 2021 AT 5:43 PM