What color and type of engine coolant should be used in a 2003 Suburban?

The recommended engine coolant for a 2003 Suburban is a Dex-Cool antifreeze/coolant. Dex-Cool is a long-life coolant that is designed to last up to 5 years or 150,000 miles. It is also a silicate-free coolant, which means that it will not damage the aluminum components in the engine. The color of Dex-Cool coolant is orange.

Here are some additional tips for maintaining the cooling system in your 2003 Suburban:

* Check the coolant level regularly and add coolant as needed.

* Flush the cooling system every 5 years or 150,000 miles.

* Use a coolant filter to remove harmful contaminants from the coolant.

* Avoid using harsh chemicals or cleaners in the cooling system.