Global Parts 4813166 A/C Refrigerant Discharge Hose

A/C Refrigerant Discharge Hose for Silverado and Sierra HD

Global Parts 4813166 is an A/C refrigerant discharge hose for the high-side side of the air conditioning system. It routes refrigerant from the compressor to the condenser and is built with aluminum and rubber construction for the listed heavy-duty truck applications.

Key Features

• Part number: 4813166
• Material: aluminum / rubber
• Refrigerant type: R134a
• Discharge end size: No. 8
• End 1 connector type: P-nut fitting
• End 2 connector type: sealing washer
• Gasket or seal included: yes
• Mounting bracket included: yes
• Switch port included: yes, with 1 switch port
• Service port included: no

Product Details

This A/C refrigerant discharge hose is built for the compressor-to-condenser path in R134a systems. It is a direct-fit style replacement for 2011-2014 Chevrolet Silverado 2500 HD, 2011-2014 Chevrolet Silverado 3500 HD, 2011-2014 GMC Sierra 2500 HD, and 2011-2014 GMC Sierra 3500 HD, except Ambulance Package vehicles. This part cross-references Dorman - Autograde 66003 for the same application.

Global Parts 4813166 is a practical choice when replacing a leaking, damaged, or corroded high-side A/C line on Silverado and Sierra HD trucks. The included seal and mounting bracket support a cleaner replacement on the listed applications, while the switch port provision helps match the original system layout.

Common Reasons for Replacement

• Refrigerant loss from a cracked or leaking discharge hose
• Corrosion or wear at the hose ends or fittings
• A/C performance loss caused by high-side pressure leakage
• Damage to the original hose assembly from vibration or road exposure
• Fitment issues when restoring the compressor-to-condenser refrigerant path

Installation Notes and Tips

Verify the vehicle is equipped with the listed R134a system before installation. Inspect the mating surfaces, replace worn seals as needed, and confirm the P-nut fitting, sealing washer connection, and No. 8 discharge end size match the original routing. Check for proper bracket alignment and confirm the switch port configuration before charging the system.

Quality Assurance

Global Parts supplies HVAC replacement components for service applications that require correct hose routing, connector style, and refrigerant compatibility. This part is built to match the listed fitment and system requirements for the specified Chevrolet Silverado HD and GMC Sierra HD models.