PIC5136B: Clicking Noise From Front Wheels ('09-'10 CTS-V)

[WickedMom]

#PIC5136B: Clicking Noise From Front Wheels - (Jun 2, 2010)
Subject: Clicking Noise From Front Wheels
Models: 2009 - 2010 Cadillac CTS-V
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This PI was superseded to update wheel part numbers. Please discard PIC5136A.
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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
A customer may comment on a clicking noise emanating from the front wheels. This condition is noticed at low speed (walking speed) during full wheel lock turns on dry clean pavement (Full lock parking lot maneuver). The clicking noise is generally noted as approximately 1 to 4 "clicks" per wheel revolution. The cause may be interaction between wheel mounting face and wheel mounting surface on rotor.

Recommendation/Instructions:
Complete the procedure below on both front wheels.

Note: It is not necessary to clean the rear wheels for the "clicking" condition.

•Remove the front wheels.
•Clean the rotor top hat as follows.
• 2.1 Use a clean cloth dampened with GM Brake Parts Cleaner 12378556 or equivalent.

• 2.2 Clean the wheel mounting surface of the rotor (rotor top hat). During cleaning process be sure to clean the rotor near the wheel pilot at the center of the rotor.

•Replace the front wheels with the appropriate part number listed below which have a revised mounting surface.
20951880 Painted Wheel

20951881 Polished Wheel

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.

[G8GXP4now]

Thanks, my dealer somehow overlooked this last week!