open the rear doors or tail gate, there are two screws in the door jamb that hold the tail light lense in place, remove them and the lense will come off, there are 2 screws on the back of the lense that hold the assembly where the bulbs plug in, replace bulb and reversre to re-install
You might have a short. You would need to take you car in to a shop to find they short. They can be very difficult to locate.
A diagram to replace the brake light on a 1999 Tahoe can be purchased from your local auto parts store. It is located in the Haynes 1999 Tahoe Repair Manual.
No you do not.
Take it to the dealership.
take it to chevy
You can replace just one if that is all the problem there is.
Price for parts on 99 tahoe head gasket
I trired swapping with a friend's who has the same relay and I have the same problem..
Get valve,clean it or replace it
From inside the trunk pull back the carpet and get access to the tailight assembly. Remove the fasteners on the tailights then unscrew the bulbs and replace.
Blinker - 1999 is rated/received certificates of: Belgium:KT Netherlands:AL
Replace the master cylinder.