How do you stop lights blinking without keyless entry on a 2004 envoy do?

To stop the lights from blinking on a 2004 GMC Envoy without using keyless entry, you can manually lock the doors using the physical key or the interior lock button. Ensure all doors are closed properly, as an open door can trigger the blinking lights. If the issue persists, check the vehicle's battery and electrical connections, as a faulty connection might cause the lights to blink.