Universal Air EX5378C A/C Orifice Tube - Front

Black Orifice Tube for A/C Flow Control

Universal Air EX5378C is a black A/C orifice tube used in fixed-orifice HVAC systems to regulate refrigerant flow through the evaporator circuit. It is listed across a wide range of GM cars, trucks, and SUVs, including Chevrolet Silverado, GMC Sierra, and Cadillac Escalade applications.

• Black orifice tube for fixed-orifice A/C systems
• Fits a broad range of GM truck, SUV, and passenger car applications
• Application-specific coverage for front or N/A positions as listed
• Used in 13mm tube diameter and condenser-mounted configurations where specified
• Part number EX5378C for catalog and search reference

Product Details

The Universal Air Black Orifice Tube, part number EX5378C, is a flow restrictor used in automotive air conditioning systems that rely on a fixed orifice design. It is listed for many Chevrolet Silverado and GMC Sierra models, along with Hummer H2, Cadillac Escalade, Tahoe, Suburban, Yukon, Camaro, Firebird, and other GM platforms from 1980 through 2011. This part number EX5378C is a direct search match for buyers looking for a black orifice tube for GM A/C service work.

Fits 2007 Chevrolet Silverado 1500 Classic, N/A. Fits 2003-2006 Cadillac Escalade, front. Fits 2000-2006 Chevrolet Tahoe, N/A. Fits 2007-2010 GMC Sierra 3500 HD, N/A. Fits 2008-2009 Hummer H2, front. Fits 1999-2007 Chevrolet Silverado 1500, N/A. Fits 1990-2000 GMC C1500, front. Fits 1988-2005 Chevrolet Cavalier, N/A.

Common A/C Problems It Can Address

• Restricted refrigerant metering in a fixed-orifice A/C system
• Incorrect cooling performance after A/C service
• Need for a replacement black orifice tube during evaporator or condenser-side repair
• Service work on GM trucks, SUVs, and passenger cars with listed factory-style applications

Installation Notes

Verify the vehicle year, make, model, and A/C configuration before installation. Several listings specify 13mm tube diameter, condenser mounting, front position, or a first-design receiver drier requirement, so match the original system layout before ordering. EX5378C is listed for fixed-orifice applications only and should be installed according to the vehicle’s HVAC service procedure.

Quality Assurance

Universal Air identifies this component as a black orifice tube for fixed-orifice A/C applications. Confirm the listed fitment details against the vehicle’s original HVAC setup to ensure correct application.