Assuming headlights, check fuses. Overheadlights, check override button left side of dash board near odometer.
generally at night.
The turn signal relay on a 2001 Chevy Tahoe is located behind the lower dashboard on the driver's side. It is just to the left of the cigarette lighter.
either dimmer switch or blown fuse If you are saying that the tail brake lights are working but the third brake light is not....It may be a defective turn signal switch in the steering column.
Defintely a fuse or a bulb, check them all.
Turn real sharp while moving and see if you feel the front wheels jerking
see your dealer about a recall for flasher
Start with checking the fuses and bulbs. See sources and related links below for bulb information.
Turn key on ( do not start ) then push the gas pedal all the way down 3 times and then turn key off and then start the engine.
Replace the front and rear turn signal bulb....the elements inside are touching and backfeeding the system
Turn on the Bright Lights was created in 2001-11.
You don't. That would be Illegal.
Check the fuse