GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value

Yes

No

1

Check the refrigerant supply.

Is the supply empty or low?

--

Go to Step 2

Go to Step 3

2

  1. Check the display for CHECK REFRIGERANT.
  2. If shown, add more refrigerant before recycling.
  3. Follow the manufacturer's instructions.

Is the display blank?

--

System OK

--

3

Check the moisture indicator.

Is the indicator faulty?

--

Go to Step 4

System OK

4

Open the valves.

Are the valves open?

--

System OK

--