PIT5139C

Bulletin No.: PIT5139C
Date: Sep-2015
Subject:
Diagnosing Suspension And Rear End Sway
Models:
2008-2016 Buick Enclave
2009-2016 Chevrolet Traverse
2007-2016 GMC Acadia
2007-2010 Saturn Outlook
This PI was superseded to update model years. Please discard PIT5139B.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
Some owners may comment while switching lanes at highway speeds there is a slight rear end sway feel. They could say it feels like driving in a cross-wind.
Recommendation/Instructions
Follow SI document for Symptoms - Suspension General Diagnosis.
Follow SI document for Body Leans or Sways in Corners.
Inspect the rear suspension components for signs of damage or looseness.
Inspect the rear toe adjustment bar bushings with the suspension loaded (see picture below).
Use a pry bar and apply forward and rearward pressure to the bushings at the spindle end. Also test at the frame end.
Warranty Information
The correction for this concern may be one of several repairs described above. For vehicles repaired under warranty, please use the appropriate warranty
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labor operation based on the actual cause and repair.
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.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may
occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools,
safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that
your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
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