2020 Chevrolet Tahoe Clicking Noise? Here's How to Fix It

How to Fix Clicking Noise

If you're experiencing a clicking noise in your 2020 Chevrolet Tahoe, you're not alone. Many owners have encountered this issue, which can sometimes be intermittent and difficult to pinpoint. As one owner reported, “Don’t drive the truck much normally sits in the garage during the week only out during the weekend. Had the shop who installed my sound system double check their work and all wiring on that part is fine." (source) This guide will walk you through the symptoms, potential causes, diagnosis, and steps to resolve the clicking noise in your vehicle.

Symptoms

The primary symptom reported by 2020 Chevrolet Tahoe owners is a clicking noise. This noise can manifest in various ways, making it crucial to observe specific details for accurate diagnosis.

Owners often describe the clicking as intermittent, sometimes appearing only under certain conditions. This can make it challenging to reproduce the noise consistently, complicating the diagnostic process. Some owners have mentioned that the noise is more prevalent when the engine is cold or during specific driving conditions.

In some instances, the clicking noise is associated with other symptoms. These can include performance issues, such as a loss of power or rough idling. You might also notice changes in brake pedal pressure, indicating a potential issue within the braking system as well. One owner mentioned, "Brake fluid need to be replaced? I purchased a 2020 Tahoe 5.3 V8 five months ago from a Honda dealership, where they claimed to have replaced all the fluids and brake pads/rotors." (source) While this quote focuses on brake fluid, it highlights the importance of checking all systems when unusual noises occur.

Another key aspect to consider is the location of the clicking noise. Listen carefully to identify whether the sound is coming from the engine bay, under the vehicle, or inside the cabin. This can provide valuable clues as to the source of the problem. Some owners have reported the noise originating from the passenger side of the vehicle.

Most Likely Cause

Based on owner reports, the most likely cause of a clicking noise in your 2020 Chevrolet Tahoe is an intake leak. An intake leak occurs when there is an unsealed opening in the intake manifold or its associated components, allowing unmetered air to enter the engine.

This unmetered air disrupts the engine's air-fuel mixture, leading to various issues. The engine control unit (ECU) tries to compensate for the lean condition caused by the extra air, potentially leading to rough idling, reduced fuel economy, and performance problems. The clicking sound itself can be caused by the vacuum created by the leak, or the sound of air rushing into the engine through the unsealed opening.

An intake leak can arise from various sources, including damaged or cracked intake manifold gaskets, loose or cracked vacuum hoses, or issues with the intake manifold itself. Given the complexity of the intake system, a thorough inspection is essential to identify the exact location of the leak.

How to Diagnose

Diagnosing an intake leak requires a systematic approach. Here’s a step-by-step guide:

1. Visual Inspection: Start by visually inspecting the intake manifold, vacuum hoses, and related components. Look for any obvious signs of damage, such as cracks, loose connections, or deteriorated hoses. Pay close attention to the intake manifold gaskets, as these are common areas for leaks to develop.

2. Listen Carefully: With the engine running, listen closely around the intake manifold and vacuum hoses for any hissing or whistling sounds. These noises can indicate the presence of a leak. A mechanic's stethoscope can be helpful in pinpointing the exact location of the noise.

3. Smoke Test: A smoke test is a highly effective method for detecting intake leaks. This involves using a smoke machine to introduce smoke into the intake system. Any leaks will be revealed by smoke escaping from the affected area. Smoke machines can be purchased or rented from auto parts stores.

4. Propane Torch Test (Use with Caution): Carefully direct a small amount of propane around the intake manifold and vacuum hoses. If the engine RPMs increase when propane is near a specific area, it indicates a leak in that location. The propane is being drawn into the engine through the leak, enriching the air-fuel mixture and causing the RPMs to rise. Exercise extreme caution when using propane, as it is flammable.

5. Scan for Diagnostic Trouble Codes (DTCs): Use an OBD-II scanner to check for any DTCs related to the engine's air-fuel mixture. Codes such as P0171 (System Too Lean, Bank 1) or P0174 (System Too Lean, Bank 2) can indicate the presence of an intake leak. However, keep in mind that these codes can also be triggered by other issues, so further diagnosis is needed.

6. Check PCV Valve: Though not directly an intake component, a faulty PCV valve or related hoses can also mimic the symptoms of an intake leak and potentially contribute to unusual noises. Inspect the PCV valve and its connecting hoses for any cracks or damage.

Tool Requirements:

• Mechanic's stethoscope
• Smoke machine (optional)
• Propane torch (optional)
• OBD-II scanner
• Basic hand tools (wrenches, screwdrivers)

Step-by-Step Fix

Once you've diagnosed an intake leak, follow these steps to fix it:

1. Gather Necessary Parts: Based on your diagnosis, acquire the necessary replacement parts, such as intake manifold gaskets, vacuum hoses, or a new intake manifold. Ensure that you purchase high-quality parts that are specifically designed for your 2020 Chevrolet Tahoe.

2. Prepare the Vehicle: Disconnect the negative battery cable to prevent any electrical issues during the repair. Allow the engine to cool down completely before beginning work on the intake system.

3. Remove the Intake Manifold: Carefully remove the intake manifold, following the manufacturer's instructions. This typically involves disconnecting various hoses, sensors, and electrical connectors. Be sure to label all connections to ensure proper reassembly.

4. Inspect the Intake Manifold: Once the intake manifold is removed, inspect it for any cracks or damage. Clean the mating surfaces on the cylinder heads and intake manifold to ensure a proper seal.

5. Replace Intake Manifold Gaskets: Install new intake manifold gaskets, ensuring that they are properly seated. Use a torque wrench to tighten the intake manifold bolts to the manufacturer's specifications.

6. Replace Vacuum Hoses: Replace any cracked or deteriorated vacuum hoses. Ensure that all hoses are properly connected and secured.

7. Reinstall the Intake Manifold: Reinstall the intake manifold, carefully reconnecting all hoses, sensors, and electrical connectors. Double-check all connections to ensure that they are secure.

8. Reconnect the Battery: Reconnect the negative battery cable.

9. Start the Engine: Start the engine and listen for any unusual noises. Monitor the engine RPMs and check for any DTCs.

10. Test Drive: Take the vehicle for a test drive to ensure that the clicking noise is gone and that the engine is running smoothly.

One owner shared: "I bet just like every other dealership, I know I worked in one for a while, that tool is probably in the corner collecting dust. By the way there is a service bulletin using the PICO tool to diagnose 6.2 Crankshaft wear." (source). While this refers to a different tool and a different engine, it highlights the importance of using the right tools for proper diagnosis and repair.

Parts and Tools Needed

• Intake manifold gaskets (Part number will vary depending on your engine)
• Vacuum hoses (Assorted sizes)
• Intake manifold (If necessary)
• Throttle body cleaner
• Gasket scraper
• Torque wrench
• Socket set
• Wrench set
• Screwdrivers
• OBD-II scanner

Real Owner Costs

The cost to fix an intake leak on your 2020 Chevrolet Tahoe can vary depending on the severity of the leak, the parts needed, and whether you choose to do the repair yourself or take it to a mechanic.

DIY Repair:

• Intake manifold gaskets: $20 - $50
• Vacuum hoses: $10 - $30
• Throttle body cleaner: $5 - $10
• Total DIY Cost: $35 - $90 (plus the cost of any tools you may need to purchase)

Professional Repair:

• Labor: $200 - $500 (depending on the shop rate and the complexity of the repair)
• Parts: $50 - $200 (depending on the parts needed)
• Total Professional Cost: $250 - $700

Keep in mind that these are just estimates, and the actual cost may vary. It's always a good idea to get a quote from a few different mechanics before making a decision.

Prevention

Preventing intake leaks in your 2020 Chevrolet Tahoe involves regular maintenance and inspections. Here are some tips:

• Regularly Inspect Vacuum Hoses: Check your vacuum hoses for cracks, wear, and loose connections. Replace any damaged hoses promptly.
• Maintain Engine Cooling System: Overheating can damage intake manifold gaskets and other components. Ensure that your engine cooling system is functioning properly.
• Use High-Quality Parts: When replacing parts, always use high-quality components that are designed for your vehicle.
• Follow Maintenance Schedule: Adhere to the manufacturer's recommended maintenance schedule for your vehicle. This includes regular inspections and servicing of the engine.

What Owners Say

Real experiences from CHEVROLET owners:

Success Stories

"I bet just like every other dealership, I know I worked in one for a while, that tool is probably in the corner collecting dust. By the way there is a service bulletin using the PICO tool to diagnose 6.2 Crankshaft wear." — jus_narley (source)

Owner Experiences

"I live at 6500 ft in the mountains where we get seasonal weather and we're just now entering our snow season. My Dodge Durango got me this far and I can afford a used but in excellent condition Tahoe." — Humble_Plastic_5259 (source)

"I know that doesn't sound very good but my health is poor. Up here when the snow really comes down we really need to be ready for it and be able to get back and forth to the pharmacy and the doctors and the grocery store and things like that." — Humble_Plastic_5259 (source)

"Don’t drive the truck much normally sits in the garage during the week only out during the weekend. Had the shop who installed my sound system double check their work and all wiring on that part is fine." — FarEase7471 (source)

Lessons Learned

⚠️ "I didn't think much of it until friends pointed out that the brake fluid appears dirty and should be flushed and replaced. I still have the paperwork, but it doesn't mention anything about the brake fluid." — Buc_ees (source)

⚠️ "So change fluid, temporarily fixes the shudder, after the transmission learns adjusts, the shudder comes back. I wish I had access to GM Global Connect, TSBs, a good GM engineer, and the tools needed to study the behaviors as time goes by." — jus_narley (source)

FAQ

Q: How long does it take to fix an intake leak?

A: The repair time can vary depending on your mechanical experience and the complexity of the leak. A DIY repair could take anywhere from 2 to 6 hours. A professional mechanic can typically complete the repair in 2 to 4 hours.

Q: Can I drive with an intake leak?

A: While it's possible to drive with an intake leak, it's not recommended. An intake leak can cause engine performance issues, reduced fuel economy, and potential damage to other components. It's best to address the issue as soon as possible.

Q: Is this a common issue on the 2020 Chevrolet Tahoe?

A: While not necessarily a widespread issue, intake leaks can occur on the 2020 Chevrolet Tahoe due to the age of the vehicle and the wear and tear on the intake system components. Regular maintenance and inspections can help prevent this issue.

Q: DIY vs mechanic - what's recommended?

A: If you have experience working on engines and are comfortable with basic mechanical tasks, you may be able to fix an intake leak yourself. However, if you're not comfortable with this type of repair, it's best to take your vehicle to a qualified mechanic. As one owner noted, having access to specialized tools and technical service bulletins can be a significant advantage: "So change fluid, temporarily fixes the shudder, after the transmission learns adjusts, the shudder comes back. I wish I had access to GM Global Connect, TSBs, a good GM engineer, and the tools needed to study the behaviors as time goes by." (source)