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Engine must be running when you turn the light off- lights are operated from a vacuum system.
There is also an "override" switch located at the base of the steering column. If this switch has been activated- then your lights will not go down.
This switch was provided by G.M. for Vettes being outside in freezing temperatures. G.M. advised that the "override" switch be activated and the headlights would remain in their upright position on these cold nights.
Switch is activated by pulling down or pushing up.
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