GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC Suburban - 4WD 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Air Inlet Assembly Replacement

Removal Procedure

    Object Number: 280260 Size: SH

    Caution: When you are performing service on or near the SIR components or the SIR wiring, you must disable the SIR system. Refer to Disabling the SIR System. Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs.

  1. Disable the supplemental inflatable restraint (SIR) system. Refer to Disabling the SIR System in Restraints.
  2. Remove the passenger's knee bolster. Refer to Knee Bolster Replacement in Instrument Panel, Console and Gauges.
  3. Remove the right cowl side trim panel. Refer to Body Hinge Pillar Trim Panel Replacement in Interior Trim.
  4. Remove the air distributor. Refer to Air Distributor Duct Replacement .
  5. Remove the bolts that retain the air inlet assembly.
  6. Remove the vacuum connector.
  7. Remove the air inlet assembly from the vehicle.
  8. Remove the nuts that retain the vacuum motor.
  9. Remove the vacuum motor from the air inlet assembly.

Installation Procedure

    Object Number: 280260 Size: SH
  1. Install the vacuum motor to the air inlet assembly.

    2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Install the nuts that retain the vacuum motor to the air inlet assembly.

    3. Tighten
    Tighten the retaining nuts to 2 N·m (18 lb in).

  3. Install the air inlet assembly to the vehicle.
  4. Install the bolts that retain the air inlet assembly to the vehicle.

    5. Tighten
    Tighten the four bolts to 4 N·m (35 lb in).

  5. Install the vacuum connector.
  6. Install the air distributor assembly.
  7. Install the right cowl side trim panel. Refer to Body Hinge Pillar Trim Panel Replacement in Interior Trim.
  8. Install the passenger's knee bolster. Refer to Knee Bolster Replacement in Instrument Panel, Gauges and Console.
  9. Enable the SIR system. Refer to Disabling the SIR System in Restraints.