I need help. I have a 06 Chevy Uplander equipped with a Phatnoise DMS unit. I have never utilized the features of the unit. The unit does not power off. As long as the radio is powered and the unit is in the craddle, the dms continously run. Even when the DMS display is not lit up, you can hear the DMS spinning. It will run for approximate three to four minutes, stop then restart. The dealership says its the fan or normal operation but I feel they only say that because they don't have a clue.
