For 1990-2009 cars

# SERVICE MAN. UPDATE-SEC. 1B&8A (A/C: COMPRESSOR CONTROLS)

********************************************************************** SERVICE MANUAL UPDATE SECTION 1B AND 8A **********************************************************************

APPLICATION: 1992-93 OLDSMOBILE CUTLASS AND BUICK CENTURY "A" CARS.

THE FOLLOWING REVISIONS SHOULD BE MADE TO SECTION 1B OF THE 1992-93 BUICK CENTURY AND OLDSMOBILE CUTLASS CIERA/CUTLASS CRUISER.

#### 1992 MODEL YEAR

1B-7 UNDER THE TITLE "RELAYS AND SWITCHES", THE PARAGRAPH "HIGH- PRESSURE COMPRESSOR CUT-OUT SWITCH" IS FOR THE 3.3L ENGINE ONLY.

1B-7 UNDER THE TITLE THAT READS "PRESSURE CYCLING SWITCH", IT SHOULD INDICATE THAT IT IS FOR THE 3.3L ENGINE ONLY.

1B-45 THE PARAGRAPH THAT READS "LOW-PRESSURE COMPRESSOR CUT-OUT SWITCH" SHOULD READ "HIGH-PRESSURE COMPRESSOR CUT-OUT SWITCH" (3.3L ENGINE ONLY).

1B-45 THE PARAGRAPH THAT READS "HIGH-PRESSURE COMPRESSOR CUT-OUT SWITCH" SHOULD READ "HIGH/LOW-PRESSURE COMPRESSOR CUT-OUT SWITCH" (2.5L ENGINE ONLY).

#### 1993 MODEL YEAR

1B-6 UNDER THE TITLE "RELAYS AND SWITCHES", DISREGARD THE PARAGRAPH "LOW-PRESSURE CUT-OUT SWITCH" (LG7) AND REFER TO "PRESSURE CYCLING SWITCH" (LG7 ONLY).

1B-45 THE PARAGRAPH THAT READS "PRESSURE CYCLING SWITCH" SHOULD INDICATE THAT IT IS FOR THE 3.3L ENGINE ONLY.

1B-46 THE PARAGRAPH THAT READS "LOW-PRESSURE COMPRESSOR CUT-OUT SWITCH" SHOULD READ "HIGH-PRESSURE COMPRESSOR CUT-OUT SWITCH" (3.3L ENGINE ONLY).

SERVICE MANUAL UPDATE - SECTION 8A - ELECTRICAL DIAGNOSIS (AIR CONDITIONING: COMPRESSOR CONTROLS V6 (VIN N) A/C LOW PRESSURE CUT-OUT SWITCH) - INCORRECT COMPONENT NAME AND VARIANCE READING.

THE A/C LOW PRESSURE CUT-OUT SWITCH IS NOW CALLED A/C PRESSURE CYCLING SWITCH, ITS VARIANCES SHOULD READ AS FOLLOWS:

OPENS BELOW 172 KPA (25 PSI) CLOSED ABOVE 317 KPA (46 PSI)

THIS INFORMATION SHOULD REPLACE THE INFORMATION CONCERNING THE A/C LOW PRESSURE CUT-OUT SWITCH FOUND IN CELL 64 (V6 VIN N).

PLEASE UPDATE YOUR RESPECTIVE SERVICE MANUAL ACCORDINGLY.

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.

COPYRIGHT 1992 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.