My wife, who knows nothing about cars, says it is in the center of the headliner inside the car.
yes
Car believes one door is ajar - dirty/inoperable door switch? Light manual on/dash dim/dome on switch is swivelled completely clockwise; or is shorted making car believe you want the dome light manually switched on.
Your dimmer switch may have been adjusted to the lowest setting.
See http://en.allexperts.com/q/Dodge-Repair-809/replacing-dome-light-switch.htm
The dome light switch on a 2005 Dodge Neon is located on inside the door jab. It is tucked away inside, tracing the wires of the switch is the best way to find its placement.
Most likely the fuse is blown for the dome light on the Silverado if the light doesn't come on.
I Figured it out. The dome light lens is hinged on the passenger side so you just pry the driver's side of the lens out and down to replace the bulb. The lens does not come completely like on other models.
Be sure the dome light switch is not turned on manually.
Put the dome light switch on door located on the headliner to the side of the light
on the side of the dash
Keep messing with the headlight switch, the dome light should come on depending on the car model.