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HOMESERVICE MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 821 (HVAC SYSTEMS - AUTOMATIC)REPAIR INSTRUCTIONSVACUUM CONTROL ASSEMBLY REPLACEMENTINSTALLATION PROCEDURE
1998 Chevrolet Suburban K2500, 7.4 J, Part Time

Installation Procedure

1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Installation Procedure
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Vacuum Control Solenoid Retaining Screws
    GM295343Courtesy of GENERAL MOTORS CORP.
  1. Align the vacuum control solenoid tab to the slot in the HVAC module case, then push up to seat the control solenoid.
    2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the vacuum control solenoid retaining screws.

    Tighten:  Tighten the screws to 1.5 N.m (13 lb in).

    3. Fig 2: Vacuum Control Solenoid & Vacuum Harness Connector
    GM295340Courtesy of GENERAL MOTORS CORP.
  3. Connect the vacuum harness connector to the vacuum control solenoid.
    4. Fig 3: Vacuum Control Solenoid Electrical Connector
    GM295337Courtesy of GENERAL MOTORS CORP.
  4. Connect the electrical connector to the vacuum control solenoid.
  5. Install the right I/P lower insulator panel. Refer to Closeout/Insulator Panel Replacement - Right in Instrument Panel, Gages and Console.
RENDER: 1.0x

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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.