I have a 2000 Buick Regal with a 3.8 liter V6. Over the past month it has developed a squeal. The squeal doesn't kick in until the engine isrunning for about 20 minutes. It then becomes intermittent then finally it is a constant. However when I hold the brake down and give it gas the squeal will temporarily stop. I checked out everything in front of the engine using a stick to try and locate the noise but had no luck. I jacked the car and the noise seems to be coming from the oil pan area closest to the transmission. Does this motor have any problems with main bearings? Could it be the oil pump? Suggestions?