al 4 interior lights had burned out

The glass caps that cover the bulbs screw out by hand. Then, it was just like changing any other light bulb. I put the caps back on, and magically, we could once again see our food cooking. We had asked other repair companies to replace the bulbs when we had other major work done, but they either didn't want to take the time to get a part number, or didn't want to get it for us. On the PartSelect website, it was easy for us to find and order, not to mention we saved at least $75.00 on the service call alone. Thanks PartSelect!