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Installation (4.3L With Harrison - 3500 HD, Cab & Chassis, Sierra, Silverado)

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  1. Add the proper amount of PAG oil to the compressor crankcase. See SPECIFICATIONS . Install the A/C compressor drain plug. Tighten to specification. See TORQUE SPECIFICATIONS .
  2. Install the compressor into the bracket. Install the compressor bolts. See Figure. Tighten to specification. Install the A/C compressor hose to the compressor using new sealing washers. Install the A/C compressor hose bolt to the A/C compressor. Tighten to specification.
  3. Connect the electrical connections. Install the drive belt. Evacuate and recharge the A/C system. See RECOVERY/EVACUATION & RECHARGING in GENERAL SERVICING PROCEDURES article in GENERAL SERVICING. Leak test the fittings of the component using a Leak Detector.
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