How do you reset the check engine light on a 2015 GMC Sierra truck?

To reset the check engine light on a 2015 GMC Sierra, you can use an OBD-II scanner to clear the trouble codes that triggered the light. Alternatively, you can disconnect the battery for about 15 minutes, then reconnect it, which will reset the vehicle's computer. However, it's important to address the underlying issue that caused the light to activate before resetting it. If the light reappears, further diagnostics may be necessary.