how to reset the check engine light on GMC Sierra T1XX (2019-Present)

Learn how to reset the check engine light on GMC Sierra T1XX (2019-Present) after repairs. Step-by-step guide with diagnostic steps and safety tips.

Solution

1. Preparation

• Ensure that the vehicle is parked on a level surface.
• Turn off the engine and remove the key from the ignition.
• Gather necessary tools.

2. Connect OBD-II Scanner

• Locate the OBD-II port under the dashboard on the driver’s side.
• Plug in the OBD-II scanner.

3. Turn on Ignition

• Insert the key into the ignition and turn it to the "ON" position without starting the engine.
• Wait for the scanner to initialize.

4. Reset the Check Engine Light

• Follow the prompts on the OBD-II scanner to navigate to the “Erase Codes” or “Clear Codes” option.
• Confirm the action to reset the check engine light.

5. Disconnect Scanner

• Once the check engine light is reset, turn the ignition off and disconnect the scanner from the OBD-II port.

6. Test Drive

• Start the engine and take the vehicle for a short drive to ensure the light does not reappear.