2019 Buick LaCrosse Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2019 Buick LaCrosse and How to Address Them Effectively

Find Repair Location
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 2019 Buick LaCrosse 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 Buick LaCrosse 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 are the steps to diagnose an oil leak in a 2019 Buick LaCrosse?

To effectively diagnose an oil leak in your 2019 Buick LaCrosse, start by locating the leak, which often begins with a visual inspection under the vehicle. Look for oil spots on the ground, as these can indicate the leak's source. Next, check the oil level in the engine; a significant drop may suggest a leak. Inspect the oil filter and drain plug for any signs of looseness or leakage, as these are common culprits. Additionally, examine the gaskets and seals around the engine, as wear or damage here can lead to leaks. Don't forget to check the oil pan for cracks or other damage that could be contributing to the issue. Finally, look for any visible oil around the engine itself, which may help pinpoint the leak's origin. If these steps do not reveal the source of the leak or if the problem appears complex, seeking a professional mechanic's opinion is advisable for a thorough diagnosis and repair.

What are the common causes of oil leaks in a 2019 Buick LaCrosse?

When dealing with oil leaks in a 2019 Buick LaCrosse, it's crucial to understand the common culprits that may be at play. One frequent issue is a degraded or damaged oil pan gasket, which can wear out over time and lead to leaks. Similarly, a worn valve cover gasket can allow oil to escape from the engine, creating a mess and potentially causing further damage if not addressed. Another common source of leaks is a faulty oil filter; if the filter is improperly installed or defective, it can result in significant oil loss. Additionally, pay attention to the oil drain plug; if it is damaged or not tightened correctly, it can also be a source of leaks. Lastly, seals around engine components, such as the crankshaft and camshaft seals, can deteriorate, leading to oil seepage. By being aware of these potential issues, DIYers can take proactive steps to inspect and maintain their vehicle, ensuring that any oil leaks are identified and resolved promptly to keep the engine running smoothly.

How urgent is it to address the oil leak in my 2019 Buick LaCrosse?

Addressing an oil leak in your 2019 Buick LaCrosse is not just a matter of routine maintenance; it is a pressing issue that requires immediate attention. An oil leak can significantly reduce oil levels, leading to inadequate lubrication of engine components, which may result in severe engine damage over time. Furthermore, neglecting this problem can cause the engine to overheat, potentially leading to catastrophic mechanical failures that could leave you stranded or facing costly repairs. Additionally, the safety risks associated with oil leaks cannot be overlooked; oil dripping onto hot engine parts poses a fire hazard, endangering both the vehicle and its occupants. Therefore, it is crucial to address any signs of an oil leak promptly to safeguard your vehicle's performance and ensure your safety on the road.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.