2020 GMC Savana 3500 AC Isn't Working

Common Causes of AC Malfunctions in Your 2020 GMC Savana 3500 and How to Fix Them

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
37% chance it's the
Refrigerant Leak
0%
21% chance it's the
Climate Control Electrical Issue
0%
12% chance it's the
AC Compressor
0%
30% chance it's
Something else
The most common reasons a 2020 GMC Savana 3500 AC isn't working are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.
  • Refrigerant Leak: A refrigerant leak can occur due to damaged hoses, seals, or connections, resulting in decreased cooling efficiency in the air conditioning system.
  • Climate Control Electrical Issue: A faulty climate control module or a blown fuse could be causing the electrical issues in the climate control system.
  • AC Compressor: A faulty AC compressor may be due to a lack of lubrication, electrical issues, or internal mechanical failure, resulting in inadequate cooling performance.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

What are the initial diagnostic steps to take when the AC isn't working in a 2020 GMC Savana 3500?

When your 2020 GMC Savana 3500's AC isn't functioning, start by checking the thermostat settings to ensure they are correctly adjusted to a cool temperature, as this is a common oversight. Next, inspect the air filters for dirt or clogs, which can significantly hinder airflow; replacing them can often restore AC performance. It's also crucial to examine the refrigerant levels, as low levels can lead to inadequate cooling; using a gauge can help you determine if a recharge is necessary. Look for any signs of leaks, such as oily residue, which can indicate refrigerant loss and should be addressed promptly. Additionally, test the compressor to ensure it engages when the AC is activated; if it doesn't, it may require repair or replacement. Don't forget to check the electrical connections, including fuses and relays, as faulty wiring can disrupt AC operation. Finally, using a diagnostic tool to scan for error codes can provide insights into any underlying issues that may not be immediately visible. By following these steps, you can effectively diagnose and potentially resolve the AC problems in your GMC Savana 3500.

What are the common problems that could cause the AC system to stop working in a 2020 GMC Savana 3500?

When the AC system in your 2020 GMC Savana 3500 ceases to function, there are several common issues you can troubleshoot on your own. Start by checking the refrigerant levels, as low refrigerant can significantly impair cooling efficiency. If the levels are adequate, inspect the compressor for any signs of malfunction, as a faulty compressor is a frequent culprit behind AC failures. Additionally, examine the electrical components, including fuses and relays, since electrical issues can disrupt the system's operation. Clogged or leaking refrigerant lines should also be assessed, as blockages or leaks can prevent the system from cooling effectively. Furthermore, inspect the condenser and evaporator for any damage, as these components are crucial for the cooling process. Lastly, a malfunctioning thermostat can lead to improper temperature regulation, affecting overall performance. By systematically checking these areas, you can identify potential problems and determine whether a professional mechanic is needed for repairs.

How urgent is it to repair the non-functioning AC in a 2020 GMC Savana 3500?

When faced with a non-functioning AC in your 2020 GMC Savana 3500, the urgency of repair cannot be overstated. The discomfort of sweltering heat during long drives can significantly detract from your driving experience, making it essential to address the issue promptly. Beyond mere comfort, a malfunctioning AC system poses health risks, particularly in extreme temperatures, where the risk of dehydration and heat-related illnesses increases. Additionally, neglecting the AC repair can adversely affect your vehicle's resale value; potential buyers often look for well-maintained systems, and a faulty AC can be a red flag. Furthermore, a malfunctioning AC can place undue strain on the engine, leading to further mechanical issues down the line. Therefore, prioritizing the repair of your AC system not only enhances your immediate comfort and safety but also protects your investment in the long run.

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