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GM 20938121
ABS Sensor, Rear

2007-2013 GM

Customer Questions & Expert Answers (6)
GM 20938121 ABS Sensor, Rear
GM 20938121 ABS Sensor, Rear
GM 20938121 ABS Sensor, Rear
GM 20938121 ABS Sensor, Rear
  • Part Description
    Sensor Assembly-Rear Wheel Speed
  • Position
    Rear
  • Replaces
    10384745
  • Manufacturer
    General Motors
Make sure this part fits
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  • Related Parts
  • Product Specifications
  • Vehicle Fitment
  • Customer Questions & Expert Answers
  • 2008 GMC Sierra 2500 HD ABS Sensor, Rear Diagram for 20938121
    The diagram listed above is for your reference. View diagram for your vehicle

    Related Parts for 20938121

  • Product Specifications

    BrandGenuine GM
    Manufacturer Part Number20938121
    Part DescriptionSensor Assembly-Rear Wheel Speed
    Other NamesRear Speed Sensor; Sensor, Electronic Brake Control
    Item Dimensions4.6 x 4.7 x 1.8 inches
    Item Weight0.40 Pounds
    PositionRear
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces10384745
    ManufacturerGeneral Motors
    SKU20938121
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65

  • Vehicle Fitment

    Year Make Model Trim Engine
    2007-2013 Chevrolet Silverado 1500Hybrid, LS, LT, LTZ, WT, XFE6 Cyl 4.3 L GAS, 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.0 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX
    2007-2013 Chevrolet Silverado 2500 HDLT, LTZ, WT8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL
    2007-2013 Chevrolet Silverado 3500 HDLT, LTZ, WT8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL
    2007-2013 GMC Sierra 1500Denali, Hybrid, SL, SLE, SLT, WT, XFE6 Cyl 4.3 L GAS, 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.0 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
    2007-2013 GMC Sierra 2500 HDDenali, SLE, SLT, WT8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL
    2007-2013 GMC Sierra 3500 HDDenali, SLE, SLT, WT8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L DIESEL

  • Customer Questions & Expert Answers

    Q:
    Can you help me check if this 20938121 is the right part for my car? Posted by ChevyPartsGiant Specialist
    A:
    Please Select Your Vehicle model to see if part number 20938121 is suitable before ordering.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the rear wheel speed sensor ring on those with a GVW greater than or equal to 3900 kg (8600 lb) on Chevrolet Silverado 1500? Posted by Customer
    A:
    Drivers need to lift their vehicle and take off the wheel and tire set before beginning work on vehicles with a gvw equal to or greater than 3900 kg (8600 Lb). You must now separate both the rear Wheel Speed Sensor and housing cover above the rear wheel. Using these tools j-2619-01 and j-45857 extract the Axle Shaft components including the axle housing seal in this order: Axle Shaft first, sealing ring, bearing, and Wheel Speed Sensor ring. To install the Wheel Speed Sensor ring use the driver handle j-8092 and tone ring installer j-45860 pushing the tool fully into the axle housing. Insert the Axle Shaft bearing using the j-23690 device which contains the bearing installer tool and a driver handle. Drive the assembly until the bottoming action touches the tube. Push the j-21128 tool into the Axle Shaft seal bore until it touches the tube surface. Attach the Axle Shaft first and then install the rear axle housing and the speed sensor wheel. Reattach the tire and wheel unit then place proper differential oil in the rear axle before lowering the vehicle.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the rear wheel speed sensor ring on a non-hybrid with a GVW of less than 3900 kg (8600 lb) on GMC Sierra 1500? Posted by Customer
    A:
    Service 2011 vehicles with low gross vehicle weight requires hoisting the vehicle then taking off the tire and wheel assembly before starting. You should first take out the Wheel Speed Sensor and grab the rear axle housing cover before handling the Axle Shaft. The j-2619-01 and j-45857 tools help you pull out the Axle Shaft seal, bearing, and Wheel Speed Sensor ring from the axle housing. The j-45860 tool and the j-8092 handle are used to install the Wheel Speed Sensor ring through the axle housing until the bottoming point of the tool contacts the tube. Insert the Axle Shaft bearing inside the tube using j-23690 - bearing installer and j-8092 - driver handle, drive it in until the tool hits the tube surface. Place the axle pinion oil seal (J-21128) in the tube using the axle pinion oil seal installer until it reaches the proper flush position. Set back the Axle Shaft and its components including the rear Wheel Speed Sensor before installing tires and wheels. Complete the service by pumping the right differential oil into the rear axle and allowing the car to drop down.
    Posted by ChevyPartsGiant Specialist
    Q:
    What should be done after installing the new wheel speed sensor for the 2010 Chevrolet Silverado 1500? Posted by Customer
    A:
    Reconnect the wheel speed sensor electrical connector and secure the electrical connector and sensor harness clips to the inboard frame rail.
    Posted by ChevyPartsGiant Specialist
    See expert answers on similar Wheel Speed Sensor
    Q:
    What is the first step to replace the rear wheel speed sensor ring for the 2010 GMC Sierra 1500? Posted by Customer
    A:
    First, raise and support the vehicle.
    Posted by ChevyPartsGiant Specialist
    See expert answers on similar Wheel Speed Sensor
    Q:
    What is the next step after disconnecting the electrical connector for the 2009 GMC Sierra 1500? Posted by Customer
    A:
    Remove the wheel speed sensor bolt and then take out the wheel speed sensor from the rear axle.
    Posted by ChevyPartsGiant Specialist
    See expert answers on similar Wheel Speed Sensor
    If you have any questions about this product, please don't hesitate to ask us. We will be happy to help you!

OEM GM 20938121, Excellent Performance and Perfect Fitment

To ensure reliability, purchase GM part # 20938121 ABS Sensor, Rear. It is sometimes referred to as GM ABS Sensor, GM Wheel Speed Sensor. Choosing OEM parts is the optimal decision for guaranteeing superior quality and perfect performance. These components undergo stringent quality checks and are carefully constructed to comply with GM's factory specifications, ensuring a smooth installation process.

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