2019 Chevrolet Silverado 3500 HD Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2019 Chevrolet Silverado 3500 HD and How to Fix Them

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Reviewed by
Aisha
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 2019 Chevrolet Silverado 3500 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 2019 Chevrolet Silverado 3500 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

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 and fix the oil leak in my 2019 Chevrolet Silverado 3500 HD?

When diagnosing and fixing an oil leak in your 2019 Chevrolet Silverado 3500 HD, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by locating the leak; inspect the ground beneath your vehicle for oil spots and examine the engine components, including the oil pan and filter, for visible signs of oil. Once you've identified potential sources, check the oil level to determine if a significant drop has occurred, which could indicate a serious leak. Next, inspect gaskets and seals for wear, as these are common culprits for leaks. Ensure the oil drain plug is secure and examine the oil filter for proper installation and any signs of leakage. Don't overlook the oil cooler lines, as cracks or loose connections here can also lead to oil loss. If these steps do not resolve the issue, or if the leak remains elusive, consulting a certified mechanic is advisable for a thorough inspection and repair. This methodical approach not only helps in identifying the problem efficiently but also ensures that you address the issue effectively, maintaining the health of your vehicle.

What are the common causes of oil leaks in a 2019 Chevrolet Silverado 3500 HD?

When dealing with oil leaks in a 2019 Chevrolet Silverado 3500 HD, it's crucial to understand the common problems that can lead to these issues. One of the primary culprits is a degraded or damaged oil pan gasket, which can wear out over time and result in leaks. Additionally, worn-out valve cover gaskets may fail to create a proper seal, allowing oil to escape. Another frequent source of leaks is a faulty oil filter; if the filter is defective or not installed correctly, it can lead to significant oil loss. Furthermore, a damaged or improperly tightened oil drain plug can also be a source of leaks, as it may not hold oil securely in the pan. Lastly, cracked or worn seals around engine components, such as the crankshaft or camshaft seals, can deteriorate and contribute to oil leaks. Addressing these issues promptly is essential to prevent engine damage and ensure your vehicle operates smoothly. Regular maintenance and inspections can help you catch these problems early, keeping your Silverado in top condition.

How urgent is it to address the oil leak in my 2019 Chevrolet Silverado 3500 HD?

Addressing an oil leak in your 2019 Chevrolet Silverado 3500 HD is not just a matter of routine maintenance; it is a critical safety concern that requires immediate attention. Oil is vital for lubricating engine components, and a leak can lead to a significant loss of oil, resulting in inadequate lubrication and potential engine damage. Moreover, the presence of leaking oil poses a fire hazard, especially if it comes into contact with hot engine parts. Ignoring this issue can exacerbate the problem, leading to more extensive and costly repairs down the line. Regularly checking your oil levels and addressing any leaks promptly is essential for maintaining the performance and safety of your vehicle. By taking swift action, you can prevent serious damage and ensure the longevity of your Chevrolet Silverado 3500 HD.

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2019 Chevrolet Silverado 3500 HD Oil Leak Causes & Solutions