Description
Product Overview
The ADTOPI Rear AC Block Off Kit is engineered to address the common issue of refrigerant leakage from aging or damaged rear air‑conditioning lines in full‑size SUVs and trucks. Each kit includes two rear AC block off plates, two high‑sealing O‑rings, and the necessary installation screws, all fabricated from premium aluminum alloy using CNC precision machining. The aluminum construction offers excellent corrosion resistance, high temperature tolerance, and structural rigidity, ensuring the components retain their shape and sealing integrity even under demanding engine bay conditions. The kit is designed to match the original GHT thread type and connector specifications, providing a seamless, leak‑free interface that integrates directly with the factory plumbing.
Key specifications:
– Material: High‑grade aluminum alloy
– Finish: Brushed aluminum exterior
– Thread Type: GHT
– Package: 2 plates, 2 O‑rings, installation screws
– Weight: 3.48 oz per kit
– Dimensions: 5.94 × 4.17 × 1.06 in
– Compatibility: 2000‑2014 Chevrolet Suburban, Tahoe, GMC Yukon/Yukon XL, Cadillac Escalade/Escalade ESV
Usage
This block off kit is ideal for owners who have experienced reduced rear cabin cooling, visible refrigerant loss, or corrosion on the rear AC lines. By sealing the rear portion, the front AC system can operate at full efficiency, delivering cooler air to the passenger compartment while eliminating the risk of environmental contamination from leaking refrigerant. Installation is straightforward: disconnect the existing rear lines, position the block off plates onto the factory‑rated GHT threads, secure with the supplied screws, and install the O‑rings to create a hermetic seal. The kit is suitable for DIY enthusiasts as well as professional technicians in service centers. 
Typical scenarios include:
– Vehicles that have been in service for over a decade and show signs of rear line corrosion.
– Seasonal climate control adjustments where rear cooling is no longer required.
– Fleet maintenance programs aiming to reduce refrigerant emissions and comply with environmental regulations.
Why Choose Us
ADTOPI combines automotive engineering expertise with rigorous quality control to deliver components that meet OEM standards. Each aluminum plate undergoes dimensional verification and surface treatment to guarantee a perfect fit and long‑term durability. The high‑sealing O‑rings are manufactured from a fluorocarbon compound that resists swelling, compression set, and chemical attack from refrigerants and oils. Our kits are backed by a 12‑month warranty and have earned a 4.8‑star rating from over 35 verified customers, reflecting consistent performance and satisfaction. By choosing ADTOPI, you benefit from a product that not only resolves leakage issues but also contributes to lower vehicle emissions and improved fuel efficiency.
Key Features
- Precision CNC‑machined aluminum plates ensure exact fit and corrosion resistance.
- High‑sealing fluorocarbon O‑rings prevent refrigerant escape under high pressure.
- Factory‑direct GHT thread compatibility eliminates the need for adapters.
- Simple bolt‑on installation saves labor time and reduces service costs.
- Designed for 2000‑2014 Chevrolet, GMC and Cadillac models, covering a wide vehicle base.
FAQ
Will installing the block off kit affect front AC performance?
No. The kit isolates the rear circuit while allowing the front AC system to operate normally, often improving overall cooling efficiency because the refrigerant is no longer diverted to a leaking rear line.
Do I need any special tools to install the kit?
Standard hand tools such as a socket set and torque wrench are sufficient. The kit includes all necessary screws and O‑rings, so no additional hardware is required.
Can I reinstall the original rear lines later?
Yes. The GHT threads remain intact, and the block off plates can be removed with the supplied screws, allowing you to re‑attach the original rear lines if desired.
Is this kit compatible with aftermarket rear AC components?
The kit is designed to match OEM GHT specifications. While it may fit some aftermarket parts that use the same thread standard, we recommend confirming thread compatibility before installation.
What warranty does ADTOPI provide?
All ADTOPI rear AC block off kits come with a 12‑month limited warranty covering manufacturing defects and material failures under normal use.





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