DeVille V8-4.6L VIN 9 (1995)
Expansion Block/Orifice Tube: All Technical Service Bulletins
Labor - Revised Install New A/C Seals and Orifice Tube
File In Section: 1 - HVAC
Bulletin No.: 63-12-O5A
Date: June, 1996
Subject:
Lack of A/C Cooling in City Traffic with High Ambient Temperatures
(Install New Seals and Orifice Tube)
Models:
1994-96 Cadillac Concours, DeVille, Eldorado, Seville
with 4.6L, 4.9L Engines (VINs Y, 9, B - RPOs LD8, L37, L26)
This bulletin is being revised to update the Labor Operation information. Please discard Corporate Bulletin Number 63-12-5 (Section 1 - HVAC).
Condition
Some owners may comment on a lack of sufficient A/C cooling in city traffic with high ambient temperatures, 90° F, (32° C) or greater.
Correction
Install seals, P/N 25612350, around the condenser and radiator to improve air flow across the condenser. Install a new orifice tube, P/N 52460909. The
new orifice tube is yellow. This orifice tube will increase A/C high side pressures and should not be used without the condenser seals installed.
The Eldorado ETC and Seville STS have an auxiliary engine oil cooler that is to be removed. Removal of this cooler will improve air flow across the
condenser and aid in A/C cooling. When the cooler is removed, an engine oil cooler line, P/N 25630621, and fitting, P/N 3541408, have to be installed.
The DeVille requires replacement of the orifice tube and the installation of the seals on the left and right sides of the condenser only.
Follow the procedure in this bulletin for installation of the condenser seals, new orifice tube and engine oil cooler hose (ETC and STS only) for the
particular vehicle being serviced.
Parts Information
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor
Labor
Operation
Description
Time
T2044
Improve A/C Performance
1.3 hrs
Remove Oil Cooler and
Install Oil Cooler Bypass
0.5 hr
Add
Hose (Applies to ET and
