The low-pressure service port is on the low side of the A/C system, on the line that runs from the evaporator toward the compressor, in the engine bay on the passenger side. It’s typically covered by a blue cap labeled “L.”
For the 2013 Traverse (which uses R-134a refrigerant), the A/C service ports appear as two Schrader valves on separate aluminum lines: the low-pressure port on the suction/evaporator side and the high-pressure port on the discharge side. The low-pressure port is the one you connect gauges or a charging hose to when diagnosing or adding refrigerant. Always work with the engine off and protect yourself with basic safety gear; if you’re unsure, consult a professional.
Locating the low-pressure port in the engine bay
Use the following steps to locate the port and confirm you’re accessing the low-side service port.
- Open the hood and find the A/C accumulator/drier on the passenger side of the engine bay, near the firewall.
- Trace the low-pressure line from the evaporator toward the compressor; the service port will be on this line near the accumulator/drier or along the line in the engine bay.
- Look for a Schrader valve stem with a protective cap. The low-pressure cap is usually blue and marked “L” (for low).
- Remove the cap to expose the service valve and attach your gauge or charging hose as needed.
These steps help you locate the low-pressure service port in a typical 2013 Traverse configuration. If your vehicle has a different engine type or aftermarket components, consult the service manual specific to your VIN.
Safety notes and tips
When using A/C gauges or charging equipment, follow refrigerant handling guidelines and avoid over-pressurizing the system. If you suspect a leak or other issue, have a certified technician inspect the vehicle.
Summary
In a 2013 Chevy Traverse, the low-pressure A/C port is on the low side of the system, along the line from the evaporator to the compressor, near the accumulator/drier on the passenger side of the engine bay. It’s capped with a blue cap labeled “L” and is the port used for charging and diagnostic connections with a Schrader valve.
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