I have a 2007 Jeep Grand Cherokee Laredo and my third stop light has also went out.
Will this part number you have posted work on my model?
The actual light needs to be replaced. They are super cheap, just hunt around online or go to your local stealership and pick one up.
Part# 55157397AD (all red housing including the washer nozzle)
The numbers that I have seen on mine are LED 43990
Thanks for helping