GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 Jimmy - 2WD 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Temperature Actuator Replacement

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Roll back the instrument panel.

    3. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges, and Console..

  3. Remove the electrical connectors, as necessary.
  4. Remove the retaining screws from the temperature valve actuator.

    5. The temperature valve actuator is located on top of the heater case.

Installation Procedure
  1. Install the temperature valve actuator retaining screws.
  2. Install the electrical connectors, as necessary.
  3. Roll forward the instrument panel.

    4. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges, and Console.

  4. Connect the negative battery cable.