Most modern stoves no longer have a pilot. The problem is more than likely caused by a bad
igniter on the bake manifold. The following link explains
igniter types and how to replace one:
http://www.fixya.com/support/r401858-replacing_oven_igniter_gas_range
Modern stoves are equipped with either a glow-bar or spark type
igniter. These
igniters do become weak with age and fail. This tends to be more common with the bake feature because it gets used more often. If the
igniter is worn to the point that it longer produces the correct current potential or spark, the gas valve will not open and you will not have ignition. This is actually a designed safety feature that prevents free flowing gas from entering the oven cavity without ignition. Such a condition would be dangerous and could cause a flash ignition or explosion.
If the model number you have this listed under is correct, you can see an illustration of your stove at appliancepartspros.com. Just type in the model number and look under the "Gas Burner Parts" section for item number 28 (part #AP2014008).
If you have questions, or require additional assistance, please post back and let me know. I hope this is helpful to you.