Over time your Chevy Tahoe’s air conditioner may begin to blow warm air. This is a sign that it needs to be recharged with refrigerant.
Having a mechanic recharge your air conditioner can be expensive; instead you can purchase a can of R134a refrigerant that includes a hose and recharge the system yourself. Once you have recharged it, you should have cool air in your car once again.
Allow the engine to cool for at least 20 minutes before you begin any work under the hood.