A/C - Poor Cooling Performance/Compressor Noisy
Bulletin No.: 07-01-39-004ADate: September 11, 2007
TECHNICAL
Subject:
EI07139 - HVAC Performance, A/C Not Cool, A/C Compressor Noise (Perform A/C System Diagnosis)
Models:
2006-2007 Cadillac Escalade EXT
2006-2007 Chevrolet Avalanche, Silverado
2006-2007 GMC Sierra
Supercede:
This bulletin is being revised to end the need for technician feedback and to provide corrective action. Please discard Corporate Bulletin Number 07-01-39-004 (Section 01 - HVAC).
Condition
Some customers may comment that the vehicle's A/C is not cooling or is not cold enough and/or the A/C compressor is noisy.
Correction
DO NOT REPLACE THE A/C COMPRESSOR.
GM Engineering has determined approximately 85% of all reported A/C system performance issues are a result of related A/C system components, not specific to the A/C compressor.
Follow the A/C System diagnostics found in SI prior to making a repair to the A/C System.
Warranty Information
Select the appropriate labor operation from the Labor Time Guide, based on the repair made to correct the customer's concern.
Disclaimer