GM Service Manual Online
For 1990-2009 cars only

Info - New Design Oil Pick Up Tube and Front Cover

Subject:New Design Oil Pick Up Tube and Front Cover

Models:2004 Buick Rainier
2002-2004 Chevrolet Trailblazer
2002-2004 GMC Envoy
2002-2004 Oldsmobile Bravada
with 4.2L Engine (VIN S - RPO LL8)



During the 2004 model year, there was a design change made to the engine oil pick up tube and the front cover. The first design parts used in production for 2002, 2003 and part of 2004 model year used an O-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.


Object Number: 1503947  Size: SH

First Design Engine Oil Pick Up Tube with O-ring seal


Object Number: 1503952  Size: SH

Second Design Engine Oil Pick Up Tube with Face seal


Object Number: 1503954  Size: MH

First Design Front Cover at Pick Up Tube Attachment Point


Object Number: 1503957  Size: MH

Second Design Front Cover at Pick Up Tube Attachment Point