LaCrosse V6-3.8L VIN 2 (2005)
Hose/Line HVAC: Customer Interest
A/C - Compressor Growl/Whine On Acceleration
Bulletin No.: 05-01-38-015B
Date: October 17, 2006
ADVANCED SERVICE INFORMATION
Subject:
A/C Compressor Growl/Whine Noise After Vehicle Accelerates From A Stop (Check A/C System Charge, Compressor Attaching Bolts and Line
Routing Until A Permanent Solution Is Available)
Models:
2005-2006 Buick Allure (Canada Only), LaCrosse
2005 Chevrolet Impala, Monte Carlo
2004-2006 Pontiac Grand Prix
with 3.8L V6 Engine (VINs 2, K - RPOs L26, L36)
Supercede:
This bulletin is being revised to add the 2006 model year for the Buick and Pontiac vehicles. Please discard Advanced Service Information Bulletin
Number 05-01-38-015A (Section 01 - HVAC).
Condition
Some customers may comment on an air conditioning (A/C) compressor growl or whine noise after the vehicle accelerates from a stop. The noise is
heard until the engine reaches approximately 2200 RPMs or the vehicle speed reaches 56-64 km/h (35-40 mph).
Correction
Technicians are to check for the following conditions and repair as necessary:
Perform the Air Conditioning System Performance Test to verify that the A/C system is operating properly and has a full refrigerant charge. Refer to the
Air Conditioning (A/C) System Performance Test procedure in the HVAC section of SI. Be sure to attach the "charge summary/snapshot" printout to the
shop's copy of the repair order. Refer to Corporate Bulletin Number 05-01-38-008A for more information about this warranty requirement.
Check that all the A/C compressor attaching bolts are properly tightened.
Not all models may be exactly as illustrated below but the line routing and component locations will be similar.
Check for A/C line ground outs at the following locations. Use the following steps to reposition or reroute the components as necessary:
Remove the fuel injector sight shield. Refer to the Fuel Injector Sight Shield Replacement procedure in the Engine Mechanical section of SI. Remove the
air cleaner intake duct. Refer to the Air Cleaner Intake Duct Replacement procedure in the Engine Controls section of SI.
