Download Condition Some customers may comment about an underhood rattle noise heard on acceleration or a sudden loss of A/C system performance. Cause Service Information This condition may be caused by liquid slugging of the A/C compressor. This condition may cause an internal failure in the A/C compressor. The serpentine belt tensioner and serpentine belt may also be damaged. Correction Technicians are to check the A/C system performance and compressor operation using the following repair procedure: 1. Open the hood and inspect the A/C compressor for damage and to see if the compressor is seized. Verify that the serpentine belt is not damaged or missing. If the A/C compressor is seized, proceed to step 5. 2. Perform the A/C System Performance test. Refer to the Heating, Ventilation and Air Conditioning (HVAC) section of SI. Correct any performance concerns or refrigerant leaks that are found. 3. Inspect the vehicle for other possible sources of A/C compressor noise or performance concerns. Refer to Corporate Bulletin Number 01-01-38-013 for more information. 4. After all other possible sources of A/C compressor noise or performance concerns have been eliminated, only then should the A/C compressor be replaced. 5. Remove the A/C compressor. Refer to the A/C Compressor Replacement procedure in the HVAC section of SI. 6. Inspect the transmission cooler lines for damage due to contact from the serpentine belt.