Overheating

Checked fluid levels all looked fine. Changed out thermostat and still overheating. Checked oil for signs of water and there wasn’t anything. Also checked for back pressure on the radiator and again nothing. Not seeing a leak from the radiator or water pump and now my check electric throttle alert just popped up on my dash along with the engine light. Have driven the truck around seven miles in the last week to avoid overheating the engine.