Ran into a weird issue with a DSP5 install on an LMM Duramax. Switch was working correctly for about 5 minutes then the voltage became stuck at 2.9 Volts, DSP Tune #1. Both Scan Tool and volt meter on DSP wire confirm this voltage. Tried a new DSP5 Switch, no change. Kind of at loss at this point, going to try another full reflash and see if that changes anything.