2016 gmc sierra cigarette lighter fuse Is it normal for these lighters to always be on even if the truck is off ? : r/Silverado Cigarette socket & 110V Power

Consult the owners manual to confirm whether the socket should operate when the vehicle is off

The exact location varies by vehicle, but your vehicle's owner manual should include a fuse diagram to help you locate it

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Federal and state taxes range from 23.8% of the total price of a pack of cigarettes to over 50.0% in some states, including New York

If the car is on, the readout may be closer to 14 volts

If you only have a larger vacuum, cut a toilet paper tube lengthwise so you can form it into a cone shapeone end wide enough to fit over the vacuums tube, the other end narrow enough to fit deep into the socket