How to discharge an air conditioning system and accessing the Thermal Expansion Valve (TXV)?

To discharge the air conditioning system, it is recommended to have an automotive air conditioning technician perform the task. Additionally, in order to access the Thermal Expansion Valve (TXV), the fuel and brake lines should be detached and moved aside. The refrigerant line fitting nut should then be removed and the line fitting detached from the TXV. Following this, the TXV-to-firewall mounting bolts can be removed and the valve itself can be taken out. For installation, the process is simply the reverse of removal, with the use of new O-rings or seals that have been lubricated with refrigerant oil as necessary.

Genuine GMC Terrain A/C Expansion Valve

Air Conditioning Expansion Valve

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3 A/C Expansion Valves found

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GMC Terrain Valve Kit, A/C Evaporator Thermal Expansion
Part Number: 20879991
$51.97 MSRP: $109.19
You Save: $57.22 (53%)
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Product Specifications
- Other Name: VALVE KIT, A/C Expansion Refrigerant; Expansion Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2017 GMC Terrain | SLE1 SUV, SLE2 SUV, SLT SUV | 4 Cyl 2.4L, 6 Cyl 3.0L, 6 Cyl 3.6L
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GMC Terrain Valve Kit, A/C Evpr Thermal Expn
Part Number: 84400227
$55.24 MSRP: $116.04
You Save: $60.80 (53%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Expansion Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2021 GMC Terrain | 4 DOOR SLE2, 4 DOOR SLT1, 4 DOOR SLT2 | 4 Cyl 1.5L, 4 Cyl 1.6L Diesel, 4 Cyl 2.0L
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GMC Terrain Valve Kit, A/C Evpr Thermal Expn
Part Number: 84741607
$53.30 MSRP: $95.60
You Save: $42.30 (45%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaces: 84116004
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2021 GMC Terrain | 4 DOOR SLE2, 4 DOOR SLT1, 4 DOOR SLT2 | 4 Cyl 1.5L, 4 Cyl 1.6L Diesel, 4 Cyl 2.0L

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

Valve Kit, A/C Evaporator Thermal Expansion
20879991
Q: How to discharge an air conditioning system and accessing the Thermal Expansion Valve (TXV)?
A: To discharge the air conditioning system, it is recommended to have an automotive air conditioning technician perform the task. Additionally, in order to access the Thermal Expansion Valve (TXV), the fuel and brake lines should be detached and moved aside. The refrigerant line fitting nut should then be removed and the line fitting detached from the TXV. Following this, the TXV-to-firewall mounting bolts can be removed and the valve itself can be taken out. For installation, the process is simply the reverse of removal, with the use of new O-rings or seals that have been lubricated with refrigerant oil as necessary.