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This guide provides instructions on how to recharge a Chevrolet Air Conditioner (A/C). 

Table of Contents

If your A/C is blowing hot air, there is a chance that the system may be low on freon. Charging a Chevrolet A/C system with refrigerant is easy and takes fifteen minutes.


Common symptoms that you may notice.

  • A/C blowing hot air
  • A/C blows cold, then hot
  • A/C blows cold sometimes
  • A/C blows cold air then stops

What you will need


  1. Park the Chevrolet in a safe area. Turn off the engine. 
  2. Pull the hood release under the dashboard until you hear your Chevrolet hood pop open.

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  3. To add freon to your Chevrolet, you need to locate the A/C low pressure charging port in the engine bay.  chevy ac port location

    chevy ac port location

    The A/C charging kit connector will not fit on the port for the high-pressure line.

  4. Carefully remove the cap from the low-pressure port by twisting it counterclockwise. Connect your A/C hose to the A/C charging port. You are almost ready to add freon to your vehicle A/C system. Don't start adding refrigerant to your Chevrolet A/C system yet.
  5. Start the engine and turn A/C on and set it to the max cold setting. Set the blowing fan to maximum speed. Now you are ready to recharge the Chevrolet A/C system. Add refrigerant as directed by the A/C recharge kit you are using.
  6. Press and hold the trigger until your Chevrolet A/C is charged. This process can take several minutes. When the A/C system is low on freon, the compressor may not be engaged at first.


  • As you add refrigerant, you should see the compressor kick in. As you charge, the system stops charging system every minute to obtain a pressure reading.
  • Continue adding refrigerant until your gauge reaches the charged range. Do not allow the system to overcharge.
  • This procedure is used to top off the Chevy A/C system. If your A/C system is empty, you need to remove the air from the system first. 
  • The A/C charging port location can vary between Chevrolet models, but it will be located in the engine bay in all cases. 
  • Before you start recharging the Chevrolet A/C system, make sure that other components are in working condition.

Chevrolet A/C may stop working if it is low on freon and other problems such as A/C compressor not working, bad A/C clutch, bad temperature sensor, major freon leak, etc.

The instructions in this guide will help the owner of Chevrolet Spark, Sonic, Bolt, Volt, Cruze, Malibu, Impala, Camaro, Corvette, City Express, Trax, Equinox, Traverse, Tahoe, Suburban, Colorado, Silverado, Sonic, Blazer, Astro, HHR, Uplander, Avalanche, etc. Charge the A/C that is filled freon (R134a).