2017 GMC Terrain Is Leaking Oil

Discovering the Causes of Oil Leaks in Your 2017 GMC Terrain and How to Address Them Effectively

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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 2017 GMC Terrain 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 2017 GMC Terrain 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.

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 2017 GMC Terrain?

To effectively diagnose an oil leak in your 2017 GMC Terrain, 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 signs of oil pooling or dripping, which can help you pinpoint the source. Next, examine the oil pan for any visible cracks or damage, as this is a common area for leaks. Ensure that the oil filter is securely installed and not the culprit, followed by checking the oil drain plug to confirm it is tight and leak-free. Additionally, inspect the gaskets and seals around the engine, as wear and tear in these areas can lead to oil leaks. Regularly monitoring your oil levels will also provide insight into whether there is a significant loss over time, indicating a leak. If these steps do not reveal the source of the problem, it may be time to consult a mechanic for a professional diagnosis. By following this diagnostic approach, you can efficiently identify and address the oil leak issue in your vehicle.

What are the common causes of oil leaks in a 2017 GMC Terrain?

When dealing with oil leaks in a 2017 GMC Terrain, it's essential to understand the common culprits that may be at play. One frequent issue is a worn or damaged oil pan gasket, which can deteriorate over time, leading to leaks. Additionally, a faulty oil filter or seal can also be a source of oil leakage, as any damage to these components can allow oil to escape from the filter housing. Another area to inspect is the valve cover gasket; if this gasket has aged or become compromised, it can result in oil seeping out. Furthermore, pay attention to the oil drain plug, as loose or damaged plugs can lead to significant leaks from the oil pan. Lastly, a leak from the rear main seal, located at the back of the engine, is another potential issue that can cause oil to escape. Regular inspections and maintenance can help you catch these problems early, ensuring your GMC Terrain remains in optimal condition.

How urgent is it to address the oil leak in my 2017 GMC Terrain?

Addressing an oil leak in your 2017 GMC Terrain is not just a matter of routine maintenance; it is an urgent issue that requires immediate attention. Ignoring an oil leak can lead to severe engine damage due to inadequate lubrication, which increases friction among engine components and can result in costly repairs. Furthermore, a significant drop in oil levels can cause the engine to overheat, potentially leading to complete engine failure, which is both dangerous and expensive to rectify. Beyond mechanical concerns, oil leaks pose safety risks on the road, as they can create slippery surfaces that increase the likelihood of accidents. Additionally, the environmental impact of oil leaks cannot be overlooked, as they can contaminate soil and water sources, contributing to broader ecological damage. Therefore, it is crucial to have any oil leak inspected and repaired promptly by a qualified mechanic to ensure the safety, performance, and longevity of your vehicle.

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