AIR CONDITIONING COMPRESSOR REPLACEMENT (NEW PROCEDURE)

SUBJECT: AIR CONDITIONING COMPRESSOR REPLACEMENT PROCEDURE ON 1986-1991 BROUGHAMS, 1985-1990 DE VILLES AND FLEETWOODS, 1986-1991 ELDORADOS AND SEVILLES, 1987-1991 ALLANTES

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 Rl 1 is not a recommended service procedure and will not be included in the labor time allowances. The chart below lists the service parts by model and year.

Liquid Comp. Hose Model Line Assembly Model Year P/N* P/N** Other ---------------- --------- -------- --------- ----------- DeVille/Fleetwood 1985-1987 25535702 1988 25535703 1989-1990 25533643 1991 25550234 Replace condenser, Brougham 1986-1989 1648926 liquid line, and 1990-1991 inspect/clean/replace orifice tube after replacing compressor.

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

Allante 1987-1990 1648925 Replace condenser, 1991 liquid line and inspect/clean/replace orifice tube after replacing 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.

**Install liquid line filter 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 warranty purposes use the following Labor Operations to replace the compressor assembly and install the liquid line filter.

WARRANTY INFORMATION VEHICLE SERIES Operation| | | | | | Operation Description Number | C | D | E | J | K | V --------------------------------- -------- --------------------------- Compressor Assembly - Replace D4440 | | | | | | R4 | | .9 | | | | HR6 |.7 | | 1.0| |1.0| 1.3 INC: | | | | | | R&R accumulator, discharge/suction hoses, | | | | | | liquid lines, and all 0-rings | | | | | | ADD: | | | | | | Recover/recharge A/C system |.7 | .7 | .7| | .7| .7 To install liquid line filter |.4 | | | | | 1.1 To replace A/C compressor hose assembly | | | .6| | .6| To replace condenser, liquid line, and clean | | | | | | or replace orifice tube | |1.0 | | | | 3.0 | | | | | | | | | | | |

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.