PI0558B

File in Section:
Bulletin No.:
Service Bulletin
Date:
PI0558B
September, 2012
PRELIMINARY INFORMATION
Subject:
A/C Inoperative and/or A/C Blows Warm Air
Models:
2011-2012 Buick LaCrosse, Regal
2012 Buick Verano
2011-2012 Chevrolet Cruze
2013 Chevrolet Malibu Built Prior to September 1, 2012
This PI is being revised to add a breakpoint date for the Malibu and update the
Recommendation/Instructions. Please discard PI0558A.
Condition/Concern
Some customers may comment that the A/C blows warm air or is not working at all.
Recommendation/Instructions
In some cases, the A/C refrigerant pressure sensor may read incorrectly. This could be due to a sensor issue, or the
connector assemblies may allow water intrusion.
Loss of refrigerant from the A/C pressure relief valve may also occur due to the pressure sensor never reading high
enough to engage the engine cooling fans.
1. Use the GDS 2 and a MDI to monitor the A/C High Side Pressure Sensor value in the HVAC module.
2. Compare this value to the actual gauge readings from the high side pressure.
3. If the values differ by more than 130 kPa (19 psi), remove the connector from the sensor and inspect for signs of
corrosion (you will usually notice a green residue in between the sensor and the connector).
• If corrosion is detected, you must replace both the A/C sensor and the connector.
• If NO corrosion is detected, replace ONLY the sensor.
4. If the GDS 2 pressure and actual gauge readings are within 130 kPa (19 psi), proceed with the normal diagnosis
in SI.
Parts Information
Part Number
Description
13502759
Sensor, A/C Refrigerant Press
88988301
Connector, Sensor-A/C Refrigerant Press
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
D1195
Air Condition (A/C) Refrigerant Pressure Sensor
Use Published
Labor
Operation Time
D9778*
A/C Refrigerant Pressure Sensor and Connector
0.7 hr
*This is a unique labor operation for bulletin use only. It will not be published in the Labor Time Guide.