Aitkeswk Rear A/C Block Off Kit for 2014–2019 Suburban Tahoe Yukon Escalade — Aluminum Knobs & HNBR Seal

Aitkeswk Rear A/C Block Off Kit permanently seals the rear air conditioning lines on 2014–2019 Chevy, GMC and Cadillac full-size SUVs to stop refrigerant loss and restore reliable front A/C operation.

If the rear evaporator or lines in your 2014–2019 Chevy Suburban/Tahoe, GMC Yukon/Suburban, or Cadillac Escalade are leaking or nonfunctional, this block off kit gives you a durable, serviceable way to isolate the rear system without losing refrigerant from the front circuits. The kit includes precision aluminum knobs, 304 stainless hardware and HNBR washers for a corrosion-resistant, long-lasting seal. It’s intended for technicians or experienced DIYers who want a clean, reversible solution to an otherwise costly rear A/C repair.

How does this kit stop refrigerant loss while letting the front A/C run?

The kit blocks the rear evaporator or service ports so refrigerant can’t flow into a damaged rear circuit. That isolates the leak while preserving refrigerant in the front system so the front evaporator and compressor function normally.

• Seals rear lines with aluminum alloy knobs and HNBR washers.
• Prevents refrigerant migration into a leaking rear evaporator.
• Makes the front system independent of rear circuit failures.
• Removable hardware allows future restoration of the rear system.

What vehicles and model years are compatible with this kit?

This block off kit is built to fit 2014–2019 model-year full-size GM SUVs. Confirm compatibility by checking your vehicle’s service port locations and model year before ordering.

• 2014–2019 Chevy Suburban and Tahoe.
• 2014–2019 GMC Yukon and Yukon XL, Suburban 1500/2500 models.
• 2014–2019 Cadillac Escalade.
• Verify service port fitment against the vehicle’s rear A/C plumbing before installation.

What materials and parts are included, and why do they matter?

The kit uses corrosion-resistant materials to withstand road salts and heat cycles. Included fasteners and washers provide a reliable mechanical seal and long service life compared with makeshift caps.

• Aluminum alloy knobs resist corrosion and provide durable sealing surfaces.
• 304 stainless steel bolts and nuts for strength and rust resistance.
• HNBR washers for temperature-resistant sealing against refrigerant and oils.
• Kit contents: 2x M8 flange nuts, 2x hex head bolts, 2x HNBR washers—ready for installation.

How difficult is installation and what should I expect?

Installation is straightforward for someone familiar with A/C plumbing and basic hand tools. The kit replaces damaged or missing rear fittings; the work typically involves removing the failed component, seating the HNBR washer, and torquing the included stainless hardware to specification.

• Simple hand tools required—no special refrigeration tooling for the block off itself.
• Designed for a direct swap into existing rear A/C line locations.
• Retains the option to reinstall a functional rear A/C circuit later.
• If unsure, have a qualified technician perform the install to ensure proper sealing and refrigerant integrity.

Who this is for: The Aitkeswk Rear A/C Block Off Kit is aimed at owners and mechanics of 2014–2019 Chevy Suburban/Tahoe, GMC Yukon/Suburban, and Cadillac Escalade who want a cost-effective, durable way to isolate a leaking or non-repairable rear A/C circuit. It’s a practical solution when restoring rear A/C isn’t feasible immediately, when you want to preserve the front system’s refrigerant, or when you need a reversible, serviceable seal that stands up to corrosion and heat. Before purchasing, confirm this kit’s fit for your vehicle’s rear A/C plumbing and contact our support if you need fitment help or have questions about installation.