If your pantry is on drawer slides there will be a release on each slide. Look for a small black plastic lever, pull or push down and that will release the slide. Some slides lift up and out when fully extended to release the mechanism. If this doesn't work please include a photo so we can see how the pantry is constructed. Hope this helps!
Dave & Myra
One day your life will flash before your eyes,
make sure it's worth watching!