OEM GMC Envoy A/C Expansion Valve

GMC Envoy A/C Expansion Valve Parts Questions & Experts Answers

• Expansion Valve
  88892986
  Q: How to replace the A/C Expansion Valve-auxiliary on GMC Envoy?

  A: The first step to replace the thermal expansion valve-auxiliary is Evaporator core-auxiliary removal following by the removal of foam insulators from both auxiliary lines and the auxiliary valve. A back up wrench allows users to loosen flare nuts from the thermal expansion valve-auxiliary then they should detach the auxiliary thermal expansion valve sensing bulb and retaining clip from the Evaporator core-auxiliary lines. The installation starts by removing the thermal expansion valve-auxiliary unit from the Evaporator core-auxiliary circuits while the technician compares and disposes of the o-ring seals from the Evaporator core-auxiliary system and ensures to cap or tape the lines to avoid contamination. First cut off tape or cap from Evaporator core-auxiliary lines before adding a new o-ring to install the thermal expansion valve-auxiliary. The technician must use a back up wrench to tighten the flare nuts to 5 n.m (44 lb in). Afterward install foam insulators on both the Evaporator core-auxiliary lines and the thermal expansion valve-auxiliary before reattaching the Evaporator core-auxiliary.