Air Conditioning Compressor and Condenser Hose Seal 3/8"

GM part number 13579649 is a 3/8" rubber-bonded sealing washer, also listed by GM as an air conditioning line O-ring. It seals A/C compressor, condenser, evaporator tube and refrigerant line connections. Its zinc-plated steel body and bonded rubber seal make a leak-tight joint between the line block fitting and its mating port. Replace it any time an A/C line is disconnected, because the seal can't be reused once it's compressed.

Key Features

• GM part number 13579649 (replaces 24436644 and 52477087)
• 3/8" size: 0.325" (8.26 mm) ID x 0.635" (16.13 mm) OD x 0.08" (2.03 mm) thick
• Rubber-bonded steel sealing washer (zinc and black)
• Used at compressor, condenser, evaporator tube and A/C line block connections
• Single-use; do not reinstall

Benefits

• Prevents refrigerant leaks at A/C line connections
• Restores full A/C performance after line, compressor or condenser service
• Correct OE seal profile, so no adapting or substitution needed

Fitment

• 2001–2026 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax (LB7, LLY, LBZ, LMM, LML, L5P)
• 2001–2026 GMC Sierra 2500HD / 3500HD 6.6L Duramax (LB7, LLY, LBZ, LMM, LML, L5P)
• 2020–2026 Chevrolet Silverado 1500 3.0L Duramax (LM2, LZ0)
• 2020–2026 GMC Sierra 1500 3.0L Duramax (LM2, LZ0)
• 2021–2023 Chevrolet Tahoe / Suburban, GMC Yukon / Yukon XL and Cadillac Escalade / Escalade ESV 3.0L Duramax

Need a different size? See the 1/2" A/C Hose Seal or the 3/4" A/C Hose Seal.

What's Included

• (1) 3/8" A/C sealing washer, GM part number 13579649