How to Clear Codes in a GMC Vehicle 1Locate the information link connector Obd2 scanner, below the steering column. The National OBD Clearinghouse site shows the DLC's exact place, typically with a image, for lots of models (see Resources). The DLC includes two horizontal rows of eight pins each.
2Turn the ignition key towards the "On" position. The car will not want to be began.3Plug the OBD II reader's connector in to the vehicle's DLC and initiate the reader.4Follow the directions that came together with the OBD II reader to retrieve and erase the current fault codes from the onboard diagnostics technique. Diverse scanners will execute this task in different way, including pressing an "Erase Codes" button or going via menu options.
Not all scanners have this functionality Auto diagnostic tool, so make sure the reader getting made use of can reset codes.5Disconnect the OBD II reader from the DLC after the reader has indicated that existing codes have already been erased.6Turn the ignition to "Off," then commence the car to confirm the check engine light doesn't come on. If it remains lit, repeat the above steps. If it's nonetheless lit immediately after repeating the measures, this could indicate a problem using the onboard diagnostics technique.
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