I've got a better question, why is this question in the Chevy venture forum ?
could be the alternator is about to go out
In those tail lights there is a circuit board. If it goes bad it will cause all kinds of problems.
There is a circuit board inside each light that usually shorts out. They cost around $30 each. The bulb attaches to the board
Probably because the circuit board for the bulbs is rusted out at the bottom
Yes, your tail lights will go out when your dash board lights go out.
Drop the tailgate, access the screws to remove the taillight assembly. Remove the screws holding the circuit board to the assembly, pull the board and you will have access to the bulbs.
sounds like an alternator problem
Need to know what about the dash board lights.
If memory serves me right, each tail light assembly has a printed circuit board that the bulbs plug into. That circuit board burns out. That part is available from the Chevy dealer.
Assuming headlights, check fuses. Overheadlights, check override button left side of dash board near odometer.
I just did this to my radio. You must remove the radio for the dash. Open the radio to reveal the circuit board and solder new bulbs on the board. I found the bulbs at Radio shack online.
The lights are automatic for your daytime running lights AND your regular head lights. There is a light sensor on your dash that knows when it get dark. When it's dark your headlights will automatically come on, daytime lights turn off and your dashboard lights will dim as a result, since you no longer need them to be that bright when it's dark. As far as the parking brake, it triggers your daytime lights to turn off, so when you disengage your parking brake, they will turn on for normal driving. All of this is a good thing because you never have to worry about turning your on/off...ever.