1995 Other Chevrolet Models CAMSHAFT SPROCKET GEAR REMOVAL

I'm working on a 1995 Chevy P30 stepvan with a 6.5L diesel. I replaced the water pump because it was leaking but then discovered the timing cover backside gasket was leaking also. I removed the pump, alternator and all other items to access the cover. I removed all the cover mounting bolts, including the oil pan bolts, as well as the vibration dampner. The camshaft sprocket has to be pulled out and away so the timing cover swings out. I removed the three bolts holding the sprocket in place but it won't pull out. You can move it in and out about 1/4" but it won't pull free. I need an answer as soon as possible so I can get the customer back his truck. You can call me at 843-532-5771 if you need additional information; I will be monitoring this site for your reply.