TrailBlazer 4WD L6-4.2L VIN S (2002)
During the 2004 model year, there was a design change made to the engine oil pick up tube and the front cover as shown. The first design parts used in
production for 2002, 2003 and part of 2004 model year used an 0-ring type seal between the pick up tube and the front cover. The second design parts
began production during the 2004 model year and use a face type seal.
Anytime the front cover or oil pick up tube are being serviced, be sure to identify which design is being serviced. The correct pick up tube must be used
with its corresponding front cover or an engine failure could result.
Any vehicle requiring a new front cover must be serviced with the second design front cover, therefore, the engine oil pick up tube must be replaced at
the same time.
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