LS4 oil pump ??
09-02-2011, 09:58 PM
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LS4 oil pump ?? I ordered a LS4 oil pump (GM #12571885) and it just came in today and it has a part number of 12571896. Can anyone confirm that this is the same pump with maybe a replaced part number?
09-03-2011, 05:41 AM
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I'm just looking to see if the part numbers are interchangeable.
From the website:
This 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 Trailblazers, SSR's, pick-ups, SUV's, 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. Dimesionally this pump is identical to the 12571885 high volume oil pump but is uses a different by-pass spring!
