GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2008 🢒 G3 🢒 HVAC 🢒 Heating, Ventilation, and Air Conditioning 🢒 Air Conditioning Evaporator Thermal Expansion Valve Replacement

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1251935 Size: SH
  1. Disconnect the negative battery cable.
  2. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  3. Remove the liquid evaporator pipe connector block retaining nut at the cowl.

    4. Object Number: 1251937 Size: SH
  4. Remove the expansion valve connector block retaining bolts.
  5. Remove the expansion valve.

    6. Object Number: 1251938 Size: SH
  6. Discard the O-rings.

Installation Procedure

    Object Number: 1251937 Size: SH
  1. Clean the O-ring surface areas of dirt or contamination.
  2. Install new O-rings on the evaporator tubes.
  3. Install a new expansion valve onto the evaporator tubes.

    4. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the expansion valve retaining bolts.

    5. Tighten
    Tighten the expansion valve retaining bolts to 12 N·m (106 lb in).


    Object Number: 1251935 Size: SH
  5. Install the liquid evaporator pipe connecting block retaining nut at the cowl.

    6. Tighten
    Tighten the liquid evaporator pipe connecting block retaining nut to 15 N·m (11 lb ft).

  6. Connect the negative battery cable.
  7. Evacuate and recharge the system. Refer to Refrigerant Recovery and Recharging .