ACDelco Professional Remanufactured power-steering pumps include an O-ring.
ACDelco has enhanced its power-steering lineup with a new line of Professional Remanufactured steering components designed to provide the fit, form and function of OE service parts at an attractive price.
Every ACDelco Professional Remanufactured power-steering pump includes an O-ring and pulley assembly kit when needed, so technicians are ready to deliver high-quality work right away. Warranty is 12 months/12,000 miles.
Source:
http://www.moderntiredealer.com/news/story/2013/11/acdelco-expands-reman-power-steering-pump-line.aspx
