GMC Typhoon Is Leaking Oil

Diagnosing Oil Leak Sources in Your GMC Typhoon and Effective Repair Strategies

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 GMC Typhoon 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 GMC Typhoon 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.

Troubleshooting Oil Leaks in a GMC Typhoon

When troubleshooting oil leaks in your GMC Typhoon, begin by inspecting the most visible and accessible components of the oil system. Start with the oil filter, as a loose or damaged filter is often a straightforward fix that can save you time and effort. Next, examine the oil pan and oil lines for any signs of wear or damage, as these areas are common culprits for leaks. If the leak persists, turn your attention to the engine gaskets, particularly around the valve cover and oil pan, as worn gaskets can lead to significant oil loss. Pay special attention to the front of the vehicle, where leaks may indicate issues with the drain plug or corroded oil lines. If you notice oil pooling at the upper back side of the engine, this could signal a problem with the crank seal or block plug, which may require more in-depth inspection. Additionally, be aware of any unusual smells, such as antifreeze, which could indicate a more complex issue involving coolant leaks. By following this diagnostic approach, you can effectively identify and address oil leaks, ensuring your GMC Typhoon remains in optimal condition. If you encounter difficulties or are unsure about any repairs, consulting a qualified mechanic is always a wise choice.

How to Diagnose and Fix Oil Leaks in a GMC Typhoon?

When tackling oil leaks in a GMC Typhoon, it's essential to understand the common problems that can arise within the vehicle's oil system. One frequent issue is the failure of gaskets, particularly the oil pan and valve cover gaskets, which can degrade over time due to heat and pressure, leading to leaks. Additionally, the oil pressure sensor and cam sensor are known culprits that may develop leaks, often due to wear or improper installation. Crank seals and block plugs can also fail, contributing to oil loss. It's crucial to inspect these components thoroughly, as even minor damage can result in significant leaks. By being aware of these common failure modes, you can more effectively diagnose the source of the leak and take appropriate action, whether that involves cleaning, repairing, or replacing the affected parts. This proactive approach not only helps in resolving the issue but also prevents further damage to your vehicle's engine.

How to Address an Oil Leak in a GMC Typhoon?

When dealing with an oil leak in your GMC Typhoon, it is crucial to act swiftly to prevent further damage to your vehicle and ensure your safety on the road. Ignoring an oil leak can lead to severe engine problems, including overheating and complete engine failure, which can be costly to repair. Start by identifying the source of the leak, as common culprits include valve cover gaskets, oil pan seals, and oil filters. Conduct a thorough visual inspection of your vehicle, looking for oil spots on the ground and signs of oil accumulation around engine components. Regularly checking your oil levels with the dipstick can also alert you to any sudden drops that may indicate a leak. If you discover any leaking components, such as worn gaskets or seals, it is essential to repair them promptly to avoid exacerbating the issue. Remember, timely intervention not only protects your engine but also enhances your vehicle's overall performance and longevity. If you find yourself unable to pinpoint the leak or feel uncertain about the repairs, seeking assistance from a professional mechanic is advisable to ensure the problem is resolved effectively.

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.

GMC Typhoon Leaking Oil: Causes & Repairs | RepairPal