2015 Chevrolet Silverado 2500 HD Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2015 Chevrolet Silverado 2500 HD and How to Fix Them

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Reviewed by
Devin Cabugcal
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 Silverado 2500 HD 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 Silverado 2500 HD 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

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 Silverado 2500 HD?

To effectively diagnose an oil leak in your 2015 Chevrolet Silverado 2500 HD, begin by visually inspecting the area beneath your vehicle for any signs of oil pooling or dripping, as this can help you pinpoint the leak's source. Once you have a general idea of where the leak might be, check the oil pan for any visible damage or loose bolts, as these are common culprits. Next, examine the oil filter to ensure it is properly installed and free from leaks, as a faulty filter can also contribute to oil loss. Don’t forget to inspect the oil drain plug; it should be securely tightened and undamaged to prevent leaks. Additionally, the valve cover gasket is another frequent source of oil leaks, so look for any signs of wear or deterioration. Lastly, check the oil pressure sensor for leaks, as a malfunctioning sensor can lead to oil escaping. Throughout this process, keep an eye on your oil levels, as a significant drop can indicate a more serious issue. By following this methodical approach, you can effectively diagnose and address the oil leak in your Silverado, ensuring your vehicle remains in optimal condition.

What are the common causes of oil leaks in a 2015 Chevrolet Silverado 2500 HD?

When dealing with oil leaks in a 2015 Chevrolet Silverado 2500 HD, it's essential to understand the common problems that may arise. One of the primary culprits is worn or damaged gaskets, particularly the valve cover and oil pan gaskets, which can deteriorate over time and lead to significant leaks. Additionally, the crank sensor is another area to inspect, as it can develop leaks that may cause oil to spill onto the starter, creating a mess and potential electrical issues. It's also worth checking the rear valve cover gaskets, as failures in this area are not uncommon and can result in oil seeping out. Lastly, the pressure sending unit is another component that can leak oil, contributing to the overall problem. By identifying these common issues, DIYers can take proactive steps to address oil leaks, ensuring their Silverado remains in optimal condition.

How urgent is it to address the oil leak in a 2015 Chevrolet Silverado 2500 HD?

Addressing an oil leak in your 2015 Chevrolet Silverado 2500 HD is not just a matter of routine maintenance; it is a critical safety concern that demands immediate attention. An oil leak can significantly reduce oil levels, leading to inadequate lubrication of engine components. This lack of lubrication increases friction and wear, which can ultimately result in severe engine damage and costly repairs. Moreover, oil that drips onto hot engine parts can create a fire hazard, putting both your vehicle and your safety at risk. Additionally, if the oil leak is not contained, it can seep into the environment, causing pollution that harms local wildlife and ecosystems. Therefore, it is essential to act swiftly and address any signs of an oil leak to protect your vehicle's integrity, ensure your safety, and minimize environmental impact.

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2015 Chevrolet Silverado 2500 HD Oil Leak Causes & Repairs