Reset check engine light 2004 gmc yukon?

To reset the check engine light on a 2004 GMC Yukon, you can use an OBD-II scanner to clear the trouble codes, which will turn off the light. Alternatively, you can disconnect the negative battery cable for about 10-15 minutes, then reconnect it to reset the system. However, if the underlying issue causing the light to illuminate is not addressed, it may come back on. Always ensure to diagnose and fix any issues before resetting the light.