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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 718 (HEATING, VENTILATION & AIR CONDITIONING)REPAIR INSTRUCTIONSCOMPRESSOR REPLACEMENT (3.1 L)REMOVAL PROCEDURE
1999 GMC Forward Control 5.7 R, Automatic

Removal Procedure

1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal Procedure
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  2. Remove the accessory drive belt. Refer to DRIVE BELT REPLACEMENT .
  3. Remove the lower air deflector. Refer to RADIATOR AIR BAFFLE AND DEFLECTOR REPLACEMENT - LOWER .
  4. Remove the splash shield from the right side of the engine. Refer to SPLASH SHIELD REPLACEMENT -- ENGINE .
  5. Remove the A/C compressor hose nut from the compressor.
    Fig 1: A/C Compressor, Drive Belt, Hose & Nut
    G01672546Courtesy of GENERAL MOTORS CORP.
  6. Remove the A/C compressor hose from the compressor.

    Important:  Remove and discard all sealing washers.

  7. Disconnect the electrical connector from the A/C compressor.
  8. Remove the bottom mounting bolt.
  9. Remove the 2 top mounting bolts.
  10. Remove the A/C compressor.
    Fig 2: A/C Compressor, Top & Bottom Mounting Bolts
    G01672547Courtesy of GENERAL MOTORS CORP.
  11. If replacing the compressor, drain and measure as much of the oil as possible from the removed compressor:
    1. 11.1. Drain the oil from both the suction and discharge ports of the removed compressor into a clean container.
    2. 11.2. Remove the compressor crankcase oil drain plug (1) and drain the crankcase oil into the same container.
    3. 11.3. Measure and record the amount of oil drained from the removed compressor.

      This measurement will be used during installation of the replacement compressor.

    4. 11.4. Properly discard the used PAG oil.
      Fig 3: Compressor Crankcase Oil Drain Plug
      G01672548Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.