how do i do it? do i need any special tools
oil pump replacement on 2002 Chevrolet Silverado 2500 HD
before you do this, did you have the problem identifed by a shop?? it is important to do a manual test to verify an issue. you may have excessive clearance in the bearing causing low pressure. you need to be sure you are not wasting your time and money on an unneeded repair.