This genuine GM oil pump is known as a "high volume" design used on the 2007 and later LS4 5.3L W-Body applications, the LH6, LC9 5.3L Trailblazer, SSR, Truck & SUV 6.0L and 6.2L engines with Active Fuel Management (AFM) . GM engineering determined that the increased oil volume was required to meet the demands of the AFM system.
This pump uses a thicker gerotor with a slightly larger OD than the 12586665 standard volume pump. Dimensional this pump is identical to the 12571885 high volume oil pump but is uses a different by-pass spring!
Tech Information:
- High Volume LS Oil Pump
- By-pass Spring Opens at 42-psi
- Original Equipment on Most 2007 and newer V8 LS Engines with AFM
12612289
