Park Avenue V6-3.8L VIN K (1995)
Accumulator HVAC: Customer Interest
A/C - Intermittent Thump Noise On Initial Start Up
File In Section: 1 - HVAC
Bulletin No.: 73-12-07
Date: March, 1997
Subject:
Intermittent A/C System Thump Noise On Initial Start Up from Front Passenger Side Floor Panel (Replace Accumulator)
Models:
1995-97
Buick LeSabre, Park Avenue
1995-97
Oldsmobile Eighty Eight
1996-97
Oldsmobile LSS
1997
Oldsmobile Regency
1995-97
Pontiac Bonneville
with 3.8L Engine (VINs K, 1 - RPOs L36, L67)
Condition
Some owners may comment on an A/C system thump noise. This thump noise is intermittent and can occur once during an ignition cycle. The source of
the "thump" appears to be the front passenger side floor panel. This noise can only occur with the A/C system on.
Cause
The accumulator causes the thump noise due to rapid evaporation of liquid refrigerant that has collected in the desiccant bag prior to A/C start-up.
Correction
This condition may be corrected by replacing the accumulator. The specified service accumulator is specifically designed to correct this condition and
should not be substituted for other accumulator issues. Refer to Section 1B of the appropriate Service Manual for replacement procedure.
Parts Information
Description
P/N
Accumulator - A/C
2724961
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Labor Time
D328O
Use published labor
operation time.
