[CarNutzCustomz]

Interesting TSB from the new CTS-V...perhaps not related at all but still interesting to note. Our Camaro's call for wheel nuts to be torqued to 140 ft lbs, just like the CTS-V originally. I may try upping the torque to 158 ft lb just to see if it resovles anything.

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

Condition/Concern:

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 an 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.

Important: Be careful not to use the Brake Cleaner on the painted or clear coated surfaces of the wheel.

Clean the wheels as follows.

• 2.1 Use a clean cloth dampened with GM Brake Parts Cleaner 12378556 or equivalent.
• 2.1 Wipe the mounting surface of the wheel to remove any residual grey or black material that has accumulated on the wheel mounting surface.

Clean the rotor top hat as follows.
• 3.1 Use a clean cloth dampened with GM Brake Parts Cleaner 12378556 or equivalent.
• 3.2 Clean the wheel mounting surface of the rotor (rotor top hat) to remove any residual grey or black material that has accumulated on the rotor. During cleaning process be sure to clean the rotor near the wheel pilot at the center of the rotor.

Reinstall the wheels.
• 4.1 Be sure to thoroughly dry the wheel and rotor prior to installation on vehicle.
• 4.2 Tighten wheel nuts to 215 N•m (158 lbs ft).

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.

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