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For 1990-2009 cars only

Front Or Rear Axle Vent Hose Fluid Leak- keywords differential repeat

Subject:Front or Rear Axle Vent Hose Fluid Leak

Models:2003-2007 Chevrolet Silverado Classic and Express
2007 Chevrolet Silverado
2003-2007 GMC Sierra Classic and Savana
2007 GMC Sierra
2003-2007 Hummer H2



This PI Supercedes To Update Condition. Please Discard PIP3454C.


The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:

Front or rear axle fluid leak that appears to be from the end of the axle vent hose. Most often occurs during hot ambient temperatures and/or while towing.

Recommendation/Instructions:

Installation of filter (P/N 5651682) will act as an accumulator and prevent fluid from being forced out the end of the vent tube. Install the filter vertically in either direction approximately 4 - 6" (10 - 15 cm) from the end vent cap of the hose or where convenient. Retain the filter using the supplied hose clamps and secure the filter and hose to prevent any damage

For repeat 10.5 and 11.5 rear differential vent tube leaks after filter installation, contact technical assistance for further assistance.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.