The C0050 trouble code on a 2020 Chevrolet Silverado signals a malfunction in the rear right wheel speed sensor circuit. This sensor feeds essential rotation data to GM's StabiliTrak electronic stability control system, which manages ABS, traction control, and vehicle stability functions.
Silverado ABS System Overview
GM's wheel speed sensors use Hall-effect technology to produce accurate digital signals at all wheel speeds, including near-zero rotation. The rear right sensor mounts on the axle housing and monitors a reluctor ring on the axle shaft. This data helps the Electronic Brake Control Module (EBCM) determine when to activate ABS intervention.
Symptom Identification
With C0050 stored, the ABS warning light and Service StabiliTrak message will appear on the Driver Information Center. Traction control functionality becomes limited, and the full ABS function at the rear right wheel is disabled. The truck remains safe to drive under normal conditions, but emergency stopping performance is reduced.
Common Failure Points
The rear right position on Silverado trucks experiences significant exposure to road contamination, especially in work truck applications. Hauling gravel, dirt, or encountering rough terrain can damage sensor wiring. The tone ring can accumulate metallic debris from axle or differential wear. Connector corrosion from water exposure is also prevalent.
Service Approach
Sensor replacement on the Silverado requires removing the wheel and accessing the axle housing. The sensor typically extracts with a twist-and-pull motion after disconnecting the electrical connector. Clean the mounting surface before installing the new sensor to ensure proper air gap. GM recommends driving the vehicle briefly to allow sensor relearn procedures.