REDUCED A/C PERFORMANCE REPLACE LIQUID LINES

SUBJECT: REDUCED AIR CONDITIONING PERFORMANCE (PERFORM DIAGNOSTICS - REPLACE LIQUID LINES)

MODELS AFFECTED: 1991 ROADMASTER ESTATE WAGONS; 1992 ROADMASTER SEDANS

APPLICATION:

------------- 1991 Roadmaster Estate Wagons from VIN MW401829 to MW406551 and 1992 Roadmaster Sedans from VIN NR400911 to NR419101.

CONDITION:

---------- Some vehicles built between the above listed VIN breakpoints may exhibit reduced A/C performance. This condition will be indicated by a 10 degree temperature increase at the center duct and a low side pressure that will not reach the 24 PSIG compressor cycle "off" point.

CAUSE:

------- The liquid line may be oversized at the location of the orifice tube, allowing refrigerant to "bypass" the orifice tube.

CORRECTION:

------------ The technician should perform the "poor performance diagnostics" as outlined in the Service Manual. If the performance is not improved when following the guidelines, replace the Liquid Line.

WARRANTY INFORMATION:

Labor Operation Number: D3083 Labor Time: 1.0 Hours NOTE: Time includes recover/recharge A/C system.

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.