Yes a c0035 is for LF WSS. If its still under warr. just take it to the dealer, if not measure the resistance of the LF WSS where it connects to the chassis harness by the upper shock mount. GM spec is 700-10,000 ohms. If its open or shorted replace it. If it tests ok pull off the rotor and look at your hub you probobly have some rust built up under the mounting surface of the sensor causing the sensor to pull away from the reluctor wheel which will give a weak signal. In that case replace the sensor and sand the hub until all the rust is gone, be carefull not to get anything in side the hub
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