Different drawers must be removed in different ways depending on what type of drawer slide is installed. There are basically three types of drawer slides. Undermount drawer slides are mounted under the drawer and are not seen when the drawer is pulled from the cabinet. European drawer slides are mounted on the side of the drawer box and have metal guides and a plastic roller. Ball bearing slides are mounted on the side of the drawer and run along small ball bearings.
Open the drawer and look for the drawer slide. If you cannot see the drawer slide, you most likely have an undermount slide. Look underneath the drawer and locate the two release clips on the bottom of the drawer. Press both levers to release the drawer box from the slide. Remove drawer from cabinet.
Open the drawer as far as possible. If the drawer box extends from the cabinet the full length of the drawer, you most likely have a full extension ball bearing slide. These slides have release levers located inside the drawer slide. Pull the drawer box from the cabinet and locate the two release levers on each side of the drawer--they are often black . Press both levers at the same time as the drawer is pulled to release the drawer box.
Look at the drawer and see if you have European drawer slides. European drawer slides are often a white or cream colour. If your drawer has European drawer slides, pull the drawer from the cabinet until it stops. Lower the drawer front towards the floor while keeping constant pressure pulling the drawer out of the cabinet. This will allow the small white roller to roll up and over the stop plate on the drawer slide. Remove drawer from cabinet.