GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 GMC C Sierra - 2WD 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Air Conditioning Evaporator Core Replacement

Removal Procedure
  1. Remove the heater/vent module. Refer to Heater/Vent Module Replacement .
  2. Remove the heater/vent module screws.
  3. Separate the heater/vent module.

    4. Object Number: 363774 Size: SH
  4. Remove the evaporator core from the heater/vent module.

Installation Procedure

    Important: If replacing the evaporator, add the refrigerant oil to the evaporator. Refer to Refrigerant System Capacities .


    Object Number: 363774 Size: SH
  1. Install the evaporator core to the heater/vent module.
  2. Install the heater/vent module halves.

    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 heater/vent module screws.

    4. Tighten
    Tighten the screws to 1.6 N·m (14 lb in).

  4. Install the heater/vent module. Refer to Heater/Vent Module Replacement .
  5. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  6. Leak test the fittings of the component using the J 39400-A .