As Saturntech9 stated, you need a good scan tool to read the codes and live data as the problem is happening.
This issue could be a failing speed sensor that has a bad wire and triggers the problem. Or a bad ground for the body control module section that feeds the signals to the instrument panel and the DIC.
Or an issue with the body control module itself.
A dealer level tool will let you see all the modules and any codes stored there. Many of the modules will store codes that do not turn on the CEL.
Friday, January 6th, 2017 AT 3:18 AM