My van does that when the headlights are on to remind you to turn them off,,, reason for that is there is a bell that sounds when the headlights are on , but if you have the radio on loud you wouldn't hear it , so they make the radio stay on so you notice that lights are still on. might be different for your van but that's how mine is ty
Faulty ignition switch.
when I went to work yesterday, the radio and temperature/directional head console remained on for the whole 9 hours that I worked, but did not affect the battery at all...
You must have a strong battery or they may not be pulling a whole lot of voltage for those 9 hours still as a precaution I would suggest you have your ignition checked .
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On GM vehicles of that year, when you open the door or wait a period of time, they should shut off, there is a possibilty you have a defective courtesy light switch which would cause this scenario, hope this helps!!
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