GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2002 🢒 Envoy - 2WD 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 HVAC Control Module Replacement

Removal Procedure

    Object Number: 735898 Size: SH
  1. Remove the I/P accessory trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement or Instrument Panel Cluster Trim Plate Bezel Replacement in Instrument Panel, Gages and Console.
  2. Remove the HVAC control module screws.
  3. Depress the HVAC control module tabs (3) and remove the HVAC control module (2) from the I/P (4).
  4. Disconnect the electrical connectors (1) from the HVAC control module (2).

Installation Procedure

    Object Number: 735898 Size: SH
  1. Connect the electrical connectors (1) to the HVAC control module (2).

    2. Important: Ensure that the HVAC control module tabs (3) lock into place.

  2. Install the HVAC control module (2) into the I/P (4).

    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 HVAC control module screws.

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

  4. Install the I/P accessory trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement or Instrument Panel Cluster Trim Plate Bezel Replacement in Instrument Panel, Gages and Console.