Poor A/C Performance - A/C Will Not Blow Cold Enough (Perform A/C System Checks and Replace Accumulator If Necessary)

Some customers may comment on less than desirable A/C performance, especially when ambient temperature is above 35°C (95°F).

Perform the following A/C system checks and replace the accumulator if necessary.

1. Remove the coolant recovery reservoir retaining screws.
2. Disconnect the hoses and remove the coolant recovery reservoir from the vehicle.
3. Disconnect the electrical connector from the A/C low pressure sensor.
4. Remove the evaporator outlet hose retaining nut from the accumulator.
5. Remove the compressor inlet hose retaining nut.
6. Remove the retaining screw from the accumulator retaining bracket.
7. Remove the accumulator.
8. Add the PAG oil directly into the new accumulator that was removed during the recovery process plus an additional 60 ml (2 oz). Refer to the Refrigerant System Capacities in the Service Manual.
9. Install the new accumulator.
10. Install the screw to the accumulator retaining bracket.
11. Install the evaporator outlet hose.
12. Install the evaporator outlet hose retaining nut to the accumulator.

Tighten
Tighten the nut to 16 N·m (12 lb ft).

13. Install the compressor inlet hose.
14. Install the compressor inlet hose retaining nut to the accumulator.

Tighten
Tighten the nut to 16 N·m (12 lb ft).

15. Connect the low pressure sensor electrical connector.
16. Evacuate and recharge the refrigerant. Refer to Refrigerant Recovery and Recharging in the HVAC sub-section of the Service Manual.
17. Leak test the fittings using J 39400-A Halogen Leak Detector.

Parts are currently available from GMSPO.

For vehicles repaired under warranty, use: