Thanks for the reply, Rick. I definitely don't have low fluid. It is right at the full line. Due to the fact that it gets much worse as the van heats up, it makes me doubt it is the reservoir. On cold start, it only makes the sound when you turn the wheel all the way in one direction. However, as it heats up, it gets much louder. You can even hear it when just doing normal driving and slight turns. I'm assuming, if it were the pump itself, it would be consistent and the way it is now, the reservoir doesn't quite appear to be the culprit either. Would you recommend replacing it anyway or does it seem to be something else based on the symptoms. While the reservoir isn't that expensive, it is more cash than I really want to throw away if it isn't the likely culprit.