GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 Sonoma Pickup - 2WD 🢒 HVAC 🢒 HVAC Systems - Automatic 🢒 Vacuum Electrical Solenoid Replacement

Removal Procedure
  1. Remove the instrument panel carrier. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gauges and Console.

    2. Object Number: 424782 Size: SH
  2. Disconnect the electrical connector from the vacuum electrical control solenoid.
  3. Disconnect the vacuum harness connectors from the vacuum electrical control solenoid.

    4. Object Number: 427170 Size: SH
  4. Remove the vacuum electrical control solenoid retaining screws.
  5. Remove the vacuum electrical control solenoid from the vehicle.

Installation Procedure

    Object Number: 427170 Size: SH
  1. Install the vacuum electrical control solenoid to the vehicle.

    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 vacuum electrical control solenoid retaining screws.

    3. Tighten
    Tighten the vacuum electrical control solenoid retaining screws to 1.9 N·m (17 lb in).


    Object Number: 424782 Size: SH
  3. Connect the vacuum harness connectors to the vacuum electrical control solenoid.
  4. Connect the electrical connector to the vacuum electrical control solenoid.
  5. Install the instrument panel carrier. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gauges and Console.