How to Clear GM Codes

by Dwight Malone

No matter what kind of GM vehicle you drive, odds are at some point, a trouble code will be triggered and the check engine light will go on. This is your vehicle's way of telling you something is wrong and it needs to be taken care of to avoid further damage. While an engine code can be an indication of severe mechanical failure, it can also caused by minor issues. Once you've resolved the issue, the engine code will need to be cleared. The process for doing this is the same, regardless of what GM make and model you drive.

Step 1

Open the hood and locate the battery on your GM vehicle. Placement varies depending on your specific model. Generally, the battery is located in one of the four corners of the engine compartment.

Step 2

Use the adjustable wrench to loosen the bolt holding the negative battery clamp on the negative terminal. The negative clamp will be identified with a minus sign and will be connected to a black cable.

Step 3

Wait at least 30 seconds with the negative battery cable disconnected.

Step 4

Reconnect the negative battery clamp to the negative battery terminal and tighten it until it is secure and cannot be wiggled with your hand.

Step 5

Start the vehicle and check the instrument cluster on the dashboard to confirm the check engine light is off. If the check engine light is no longer on, the engine codes have been successfully cleared.

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