What kind of antifreeze do you put in a 1999 GM suburban?
A 1999 GM Suburban requires Dex-Cool antifreeze. However, it's crucial to check your owner's manual to be absolutely certain. Using the wrong type of antifreeze can severely damage your engine. Dex-Cool is a specific type of antifreeze with a different chemical composition than traditional green antifreeze. Mixing them can lead to problems.