Saginaw Style Power Steering Pump. Saginaw Style Power Steering Pump; Direct Fit; 5/8 in. This GM style Saginaw pump features all new components including reservoir and pump assembly. Available powder coating, plating, and polishing options create a variety of textures and contrasts to set your engine - and your car - apart from all the others.We are experts in the processes necessary to create each of those special decorative finishes.