Stuck on very last push puzzle at last level..

[LazyPitbull]

After I break to pipe to stop the fire I go down this hole and there are 3 doors to push and I push them but no passages..can't pull them back either..what do I do? So close to defeating the game Thanks in advance

[OE PizzaTheHutt]

After pushing those 3 buttons, there's another button in one of the new passage ways.

 

"Pizza Pizza!"