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Why isn't my GMC Sierra's lane departure alert system functioning properly?
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3 answers
★ Top Answer
If you are experiencing any issues with the lane assist feature in your GMC Sierra, such as not receiving departure warnings or being told it is unavailable, the first step is to visit a dealership for assistance. Initially, these trucks had a malfunction with this feature, but it has been resolved through a system update. If your vehicle is still under warranty, this update will be provided free of charge. If you have already had the update or if the problem persists, there may be a sensor issue that needs to be diagnosed by a mechanic or using a scanner.
More answers
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If the lane departure warning feature in your GMC Sierra is not functioning properly, it is advisable to inspect the fuse that controls this system.
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The line-keeping assist button won't activate.
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