PIT5937A

Bulletin No.: PIT5937A
Published date: 02/16/2024
Preliminary Information
PIT5937A ABS / TCS / Stability / Brake Warning Indicators
Illuminated With Wheel Speed Sensor DTCs
Models
Brand:
Chevrolet
Model:
Silverado 4500HD, 5500HD and 6500HD
Model Years:
2019 - 2024
VIN:
Engine:
from
to
All
All All
Transmissions:
All
Involved Region or Country North America
Some customers may comment on an ABS, TCS/Traction/Stability, and/or Brake
warning indicators illuminated. When checking for DTC's any of the following DTCs
may be found:
Condition
Cause
•
•
•
•
DTC C0500 or C0501 Left Front Wheel Speed Sensor (WSS)
DTC C0506 or C0507 Right Front Wheel Speed Sensor (WSS)
DTC C050C or C050D Left Rear Wheel Speed Sensor (WSS)
DTC C0512 or C0513 Right Rear Wheel Speed Sensor (WSS)
Possible causes for these concerns maybe WSS air gap out of adjustment, loose hub
bearings, debris on WSS sensor, and/or damaged reluctor ring.
Correction:
Before replacing the WSS please perform the following inspections:
1. Are all tires the same size and tread wear.
2. Inspect harness to the WSS sensor for any signs of damage or loose terminal interface.
3. Inspect the WSS air gap and make sure it is adjusted per the WSS replacement document (large gap may lead
to erratic signal, no gap may present as noise). If it appears the WSS air gap is out of adjustment, then remove,
clean, reinstall and test, see note below.
4. Visually inspect for a buildup of debris between the backing plate and the rotor (mud, Ice, dirt ECT.). Clean as
needed.
5. Inspect for a loose wheel bearing and check the torque as called out in SI.
6. Use an oscilloscope and look at the WSS pattern. Look for any spikes that can be caused by a
damaged reluctor, that will need to be inspected.
7. If a determination is made that there are no issues with the tires, wiring, connections, bearing, hub, reluctor
ring, or WSS air gap then install a new WSS.
8. Be sure to drive the vehicle after any repairs to validate the vehicle is repaired.
Note: For proper installation and air gap, ensure the WSS bottoms out on the reluctor ring inside of the hub. The
air gap will be established by the contact between the reluctor ring and the WSS.
Engineering is looking into the concern, and information will be updated when obtained.
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
2486298*
Description
Wheel Speed Sensor Inspection
*This is a unique Labor Operation for Bulletin use only.
Labor Time
0.5 Hrs.
NOTE: Use the above labor op to inspect the vehicle, then use the appropriate labor op for the actually repair
being completed.
Version History
Version
Modi ed
2
08/11/2022 - Created on.
2/16/2024 - Update to model years.
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