How do I replace the high mount third brake light on a 2002 gmc envoy? on 2002 GMC Envoy

The light does not work at all.

Asked by for the 2002 GMC Envoy
First stop by you local auto parts store and purchase the bulb(s) they should know how many are needed then pull the screws and remove the lens from the vehicle and plug in the new bulb(s)
How do you remove the light bulb for 3rd brkae light
3 more answers
Did you check your license plate lights?, because that was my problem and I was about to replace the light, but I saw that the license plate lights were off, soon as I replace them my third brake light comes on!!
How do I do it
I took mine to the dealer beacuse I bought the extended warranty. They had to replace the whole back panel because they told me that they don't make the part anymore..