2017 Chevrolet Suburban A/C Refrigerant & Oil Capacity

Quick Answer

• Refrigerant Type: R-1234yf
• Full System Charge: 22 oz (624 grams)
• PAG Oil Type: PAG 46
• PAG Oil Amount: 8.4 oz (250 mL)
• Low-Side Service Port Location: On the accumulator/dryer, typically on the passenger side of the engine bay, on the larger diameter line.
• High-Side Service Port Location: On the refrigerant line near the condenser, typically on the passenger side of the engine bay, on the smaller diameter line.

Why R-1234yf Matters

The 2017 Chevrolet Suburban utilizes R-1234yf refrigerant, a significant change from the R-134a used in older vehicles. This transition, which began around 2014 for many automotive manufacturers, was driven by environmental concerns. R-1234yf has a much lower Global Warming Potential (GWP) compared to R-134a, making it a more eco-friendly choice.

This difference has several implications for vehicle owners and technicians:

• Cost: R-1234yf is generally more expensive than R-134a, which can impact the cost of A/C repairs or recharges.
• EPA Regulations: The use and handling of R-1234yf are subject to strict EPA regulations, similar to R-134a. Proper recovery and recycling are crucial to prevent refrigerant release into the atmosphere.
• Recovery Machine Requirements: Due to its mild flammability characteristics and specific chemical properties, R-1234yf requires specialized A/C recovery and recharging equipment. These machines are designed to safely handle the refrigerant and prevent cross-contamination with R-134a systems. Attempting to service an R-1234yf system with R-134a equipment can lead to damage and is dangerous.

Recharge Procedure Cautions

Recharging your Suburban's A/C system is not as simple as adding a can of refrigerant. It's a precise process that, when done incorrectly, can lead to poor cooling performance or even system damage. Here's what you need to know:

• Evacuation is Key: Before adding any new refrigerant, the system must be thoroughly evacuated. This process uses a vacuum pump to remove all air and moisture from the A/C system. Moisture is a major enemy of A/C systems, as it can combine with refrigerant to form corrosive acids, leading to component failure.
• Charge by Weight, Not Pressure: The most accurate and recommended method for recharging an A/C system is by weight, not by simply reading pressure gauges. The 2017 Chevrolet Suburban requires 22 ounces (624 grams) of R-1234yf. Overcharging or undercharging, even by a small amount, can significantly impact cooling performance and potentially damage the compressor. Pressure readings can be misleading due to ambient temperature variations and do not account for refrigerant already in the system.
• Professional Equipment: Specialized equipment is necessary for proper R-1234yf recovery, vacuum, and recharging. This equipment ensures accurate measurement and prevents atmospheric release.

Safety Disclaimer: Working with refrigerants and automotive A/C systems requires proper training, specialized equipment, and adherence to safety protocols. Refrigerants can cause frostbite upon contact and, if inhaled, can displace oxygen leading to suffocation. It is illegal to intentionally release refrigerants into the atmosphere. Only individuals certified under EPA Section 609 should perform A/C service. Attempting to service your A/C system without the proper knowledge and tools can result in serious injury or damage to your vehicle.

Common A/C Problems for the 2017 Chevrolet Suburban

While the 2017 Suburban is a generally reliable vehicle, some A/C specific issues can arise:

• Compressor Failures: The A/C compressor is the heart of the system. Issues can range from internal wear and tear to clutch problems. Symptoms often include a lack of cold air, grinding noises, or the compressor not engaging.
• Condenser Issues: The condenser, located at the front of the vehicle, is responsible for dissipating heat. It can be susceptible to damage from road debris or corrosion, leading to refrigerant leaks or restricted airflow.
• Evaporator Leaks: The evaporator, located inside the dashboard, cools the air entering the cabin. Leaks in the evaporator can be difficult to diagnose and repair, often requiring significant dashboard disassembly. A sweet, musty odor from the vents can indicate an evaporator leak.
• Blend Door Actuator Problems: While not a refrigerant issue, faulty blend door actuators can prevent proper temperature control, making it seem like the A/C isn't working correctly. These actuators direct airflow over the heater core or evaporator.
• Electrical Issues: Problems with relays, fuses, or wiring can interrupt power to the A/C compressor or other components, leading to system malfunction.

When to Call a Pro

If you experience any of the following symptoms with your 2017 Chevrolet Suburban's A/C system, it's best to consult a certified professional:

• No cold air, or only intermittently cold air.
• Unusual noises coming from the engine bay when the A/C is on.
• Visible leaks of refrigerant or oil.
• A burning or musty odor from the vents.
• The A/C system not turning on at all.

A professional technician has the diagnostic tools and expertise to accurately identify the problem, safely recover any remaining refrigerant, perform necessary repairs, and properly recharge your system to OEM specifications.

Find a certified A/C shop on Repairius.