I just replaced my power steering pump on my 1994 LT1 Camaro with a remanufactured unit. It operated fine for about a half an hour then went again. Only mod on my pulleys is an underdrive pulley on my crank but that shouldn't cause any problems should it? I guess it could be just the reman pump. I will see if I can get a GM unit tomorrow. Has anyone else had any problems with the remanufactured pumps?