Intermittent Click Noise at Front of Vehicle, ABS, Traction Control System (TCS)/ Stabilitrak Lamps May Illuminate Intermittently and/or Deactivate for Ignition Cycle – 2016-2019 Chevrolet Volt

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Service Bulletin Bulletin No.: 19-NA-103
Date: May, 2019
TECHNICAL
Subject: Intermittent Click Noise at Front of Vehicle, ABS, Traction Control System (TCS)/Stabilitrak Lamps May Illuminate Intermittently and/or Deactivate for Ignition Cycle
Brand: Model:
Model Year: VIN:
Engine: Transmission: from to from to
Chevrolet Volt 2016 2019
Involved Region or Country North America and N.A. Export Regions
Condition
Some customers may comment on hearing an intermittent click noise in the front of vehicle. The ABS, TCS/Stabilitrak system lamps may also illuminate intermittently and those systems may be deactivated/shut off for that ignition cycle.
Cause
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The cause of the condition may be a fracturing of the front half shaft anti-click washer (1) and possible collateral damage to the ABS wheel speed sensor (WSS).
Correction
Upon verifying the condition, remove and discard the anti-click washer on the affected half shaft(s), then inspect the wheel speed sensor on that side(s). Follow the recommended steps in the Service Procedure below.
Service Procedure
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Note: In cases where the condition is verified on both sides of the vehicle, remove the anti-click washer from
BOTH sides.
1. Remove the front wheel bearing and hub assembly (1) from the vehicle, on the affected side.
Refer to Front Wheel Bearing and Hub Replacement in SI.
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Important: DO NOT install any anti-click washer.
2. Remove the anti-click washer (1) from the outboard joint of the half shaft (2) and discard.
3. If affected, repeat steps #1 and #2 on the opposite side.
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Note: As shown in the above illustration, the wheel speed sensor (WSS) (1) is directly in-line with the anti-click washer (2) on the outboard joint of the half shaft.
4. Before reinstalling the bearing/hub, inspect the WSS on either/both affected side(s) for possible damage. It may be damaged due to contact with the oversized damaged washer.
Important: Once removed, the drive shaft nut cannot be reused. Follow the recommendations in SI for this and any other fastener replacement.
• If no damage is found, reinstall the front wheel bearing and hub assembly, and no further repairs are necessary. Refer to Front Wheel Bearing and Hub Replacement in SI.
• If the WSS is found to be damaged (as shown circled in the graphic above), continue ahead to step # 5 and replace the WSS.
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5. Replace any damaged front WSS (2). Refer to Front Wheel Speed Sensor Replacement in SI.
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6. Reinstall the front wheel bearing and hub assembly (1). Refer to Front Wheel Bearing and Hub Replacement in SI.
Parts Information
Use the vehicle identification number (VIN), SI, and the GM Electronic Parts Catalog to determine the proper part to order.
Causal
Part
Description Part
Number
Qty
SENSOR ASMFRT WHL SPD
(2016-2018)
39002172
1, or 2, if
SENSOR ASM- required.
FRT WHL
SPD (2019)
39124497
Warranty Information
For vehicles repaired under the Powertrain coverage, use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information.
Labor
Operation
Description Labor Time
8080458* Remove Anti-click Washer
(one side)
0.9 hr
Add Replace WSS (one side) 0.7 hr
Add Remove Anti-click Washer
(other side) 0.8 hr
Add Replace WSS (other side) 0.6 hr
*This is a unique Labor Operation for Bulletin use only.
Version 1
Modified Released May 09, 2019

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