2015 Chevrolet Tahoe Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2015 Chevrolet Tahoe and How to Fix Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
80% chance it's the
Oil System Components
0%
20% chance it's the
Engine Gaskets
The most common reasons a 2015 Chevrolet Tahoe is leaking oil are oil system component failure and leaking engine gaskets.
  • Oil System Components: A worn or damaged oil pump or filter can lead to low oil pressure, resulting in inadequate lubrication and potential engine damage.
  • Engine Gaskets: A worn or damaged engine gasket can lead to oil or coolant leaks, resulting in engine overheating or loss of lubrication.
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.

How much does it cost to fix a 2015 Chevrolet Tahoe is leaking oil?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

Oil pans don't wear out or break like other parts, they generally only need to be replaced because of external damage from an accident or an improperly tightened drain plug. The main symptom you will experience is an oil leak underneath the engine of your car. The oil that leaks from a damaged oil pan will range from dark brown to dark black. If the leak is large enough or occurs for long enough the oil level will be low enough to turn the oil pressure or low oil level warning light on.

An oil leak may be noted on the ground where the vehicle is parked. However, many vehicles have plastic trays underneath the engine that may catch leaking oil and conceal the leak. In such cases, a low oil level, a burning oil smell, or even smoke from oil burning in the engine bay may be noted.

»MORE: Signs of a bad oil pan gasket

A bad oil level sensor may cause a false reading of the engine oil level. The oil level warning light may illuminate even when the oil level (checked manually) is within an acceptable range. The warning light may also come on and off intermittently if the sensor is faulty. An error code may be sent to the PCM and a check engine light may come on the dashboard as well if the sensor is bad.

The engine oil pressure warning light will come on if the engine oil pressure is low, or if the oil pressure sensor is faulty. In either case, engine power may be reduced significantly. The check engine light may also illuminate, and an on-board diagnostic (OBD) trouble code will be stored in the vehicle's computer.

What steps should I take to diagnose the oil leak in my 2015 Chevrolet Tahoe?

To effectively diagnose an oil leak in your 2015 Chevrolet Tahoe, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by locating the leak; inspect the ground beneath your vehicle for any visible oil spots, which can help pinpoint the source. Next, examine the oil pan for cracks or loose bolts, as these are common culprits. Ensure the oil filter is securely installed and free from leaks, as a faulty filter can also contribute to oil loss. Don’t overlook the oil drain plug; it should be tightly secured to prevent leaks. Additionally, inspect gaskets and seals around the oil pan and filter for wear, as damaged gaskets can lead to significant oil loss. The valve cover gasket is another area to check, as leaks here can be subtle yet impactful. Lastly, assess the oil pressure sensor for any signs of oil accumulation, which may indicate a problem. Throughout this process, monitor your oil levels regularly to gauge the severity of the leak. By following this diagnostic approach, you can efficiently identify and address the oil leak in your Tahoe, ensuring your vehicle remains in optimal condition.

What are the common causes of oil leaks in a 2015 Chevrolet Tahoe?

When dealing with oil leaks in a 2015 Chevrolet Tahoe, it's crucial to understand the common culprits that may be at play. One frequent issue is the deterioration of the oil pan gasket, which can wear out over time and lead to leaks. Similarly, valve cover gaskets are prone to wear and can also result in oil escaping from the engine. Another area to inspect is the oil filter housing gasket, as failures here can cause oil to leak within the engine bay. Additionally, the rear main seal, located at the back of the engine, can deteriorate and lead to significant oil loss. Oil cooler lines are another potential source of leaks, as they can develop issues over time, resulting in oil seepage. Lastly, don’t overlook the oil drain plug; a loose or damaged plug can easily lead to oil leaks. By being aware of these common problems, DIY enthusiasts can take proactive steps to inspect and address oil leaks, ensuring their Tahoe remains in optimal condition. Regular maintenance and timely inspections are key to preventing further damage and maintaining engine performance.

How urgent is it to address the oil leak in a 2015 Chevrolet Tahoe?

Addressing an oil leak in a 2015 Chevrolet Tahoe is an urgent matter that should not be overlooked. The presence of an oil leak can lead to significant engine damage due to decreased oil levels, which compromises the lubrication of vital engine components. This lack of lubrication increases friction and heat, potentially resulting in severe engine wear or even catastrophic failure. Moreover, if the leak is not repaired, it can escalate into costly repairs that could have been avoided with timely intervention. Beyond mechanical concerns, oil leaks pose environmental risks, as spilled oil can contaminate soil and water sources, leading to broader ecological damage. Additionally, there are safety implications; oil that drips onto hot engine parts can create fire hazards, endangering both the vehicle and its occupants. Therefore, it is crucial for DIY enthusiasts to act swiftly when they detect an oil leak, ensuring the vehicle remains safe, functional, and environmentally responsible.

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