There are a couple of reasons why a 1999 Tahoe headlights may not work. A couple of reasons could be blown bulbs or the wiring.
For the 1999 Chevy Tahoe, automatic headlights are turned on by default. Turning them off requires opening the bezel on the dashboard and removing the light sensor.
Is a 1999 chevy tahoe transmission compatible with a 2001 chevy tahoe transmission?
Possible problems with the transfer case.
Tahoe Air ended in 1999.
I THINK IT IS
How to change fuel filter in 1999 Chevrolet Tahoe
where is the fuel pump relay on a 1999 Chevrolet Tahoe
Tahoe Air was created in 1999-06.
The 1999 Chevrolet Tahoe didn't come with a cabin (HVAC) filter.
Staring at Headlights - 1999 was released on: USA: 4 March 2006