What type of antifreeze does my 2003 Chevy Avalanche use?

The 2003 Chevy Avalanche is equipped with ZereX1 yellow antifreeze featuring OAT technology designed for American vehicles. It should be used blended with water if not already diluted to A50/50 ratio. The coolant reservoir can be found under hood in the engine bay on the driver's side at the back of the firewall. Always check levels when the car is cooled. Never release a coolant cap when the engine is hot or has been recently running to prevent sputtering and burns from hot coolant. Signs that Your antifreeze may be low include elevated engine temperatures, warning lights and leaks from the front of the vehicle. If the thermostat, water pump or radiator hoses need replacement or repair, antifreeze levels may be impaired.