AIR CONDITIONING COMPRESSOR REPLACEMENT (NEW PROCEDURE)

SUBJECT: AIR CONDITIONING COMPRESSOR REPLACEMENT PROCEDURE (INSTALL SERVICE LIQUID LINE FILTER ASSY)

VEHICLES AFFECTED: 1985-91 "C, D, E, K, V" Models

This bulletin is being revised to update part numbers for Cadillac vehicles. The revised information will appear on an update bulletin. The remainder of this bulletin will not be published. Warranty Administration has been notified of all changes and the warranty claims processing system has been updated.

When replacing a compressor on 1985-1990 Cadillacs, inspect, clean, or replace the orifice tube as needed. Then, depending on the model and year either install a service liquid line filter assembly or compressor hose assembly to remove any debris from the refrigerant system. Flushing refrigerant systems with R11 is not a recommended service procedure and will not be included in the labour time allowances. The chart below lists the service parts by model and year.

MODEL MODEL YEAR LIQUID LINE PN* COMP HOSE ASSEMBLY P/N** OTHER ---------------------------------------------------------------------

DeVille/ 1985-1987 25535702 Fleetwood 1988 25535703 1989-1990 25533643 1991 25550234 Brougham 1986-1989 1648926 1990-1991 Replace condenser, liquid line, and inspect/clean/re place orifice tube after replacing compressor

Eldorado/ 1986-1987 1648433 Seville 1988-1989 1645304 1990 1648813 1991 3528824 Allante 1987-1990 1648925

1991 Replace condenser, liquid line, and inspect/clean/ replace orifice tube after re- placing compressor

Parts are currently available from GMSPO.

*Install liquid line filter assembly after replacing compressor and inspecting/cleaning/replacing the orifice tube. If the orifice tube screen has ripped, the evaporator may require replacement due to contamination.

**Replace compressor hose assembly after replacing compressor and inspecting/cleaning/replacing the orifice tube. The muffler on the compressor hose assembly contains screens to trap debris from contaminating the refrigerant system in the event of a compressor failure and requires replacement along with the compressor.

For vehicles repaired under warranty use:

The following Labour Times

Replace the compressor assembly and install the liquid line filter. Add .7 hour to recover and recharge the A/C system.

Vehicle Models

C D E K V

1.0 1.1 1.5 1.5 2.0

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.