GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Blazer - 4WD - RHD 🢒 Transmission/Transaxle 🢒 Manual Transmission - NV 3500 🢒 HVAC Control Module Replacement

Removal Procedure

    Object Number: 404151 Size: SH
  1. Remove the instrument panel accessory trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement in Instrument Panel, Gages and Console.
  2. Remove the control assembly retaining screws.
  3. Depress the control assembly retaining tabs and remove the control assembly from the instrument panel.
  4. Disconnect the electrical connectors from the control assembly.

Installation Procedure

    Object Number: 404151 Size: SH
  1. Connect the electrical connectors to the control assembly.
  2. Install the control assembly into the instrument panel, ensuring that the control assembly retaining tabs lock into place.

    3. 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.

  3. Install the control assembly retaining screws.

    4. Tighten
    Tighten the control assembly retaining screws to 1.9 N·m (17 lb in).

  4. Install the instrument panel accessory trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement in Instrument Panel, Gages and Console.