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.
Over time serpentine belts stretch, crack, and the ribs that ride on the accessory pulleys being to wear smooth. A squealing noise that increases with engine speed or as engine driven accessories are turned on may be noted. The noise is caused by the belt slipping on the pulleys, insufficiently driving them. Ineffective air conditioning, a battery warning light, or intermittent power steering assist can result from this.
The bad thermostat can cause two different sets of problems, depending on whether it's stuck open or stuck closed.
A thermostat that is stuck open can cause the engine to run colder than normal and turn on the check engine light. It may also cause poor fuel mileage and the heater to blow cool air.
A thermostat that is stuck closed will cause the vehicle to overheat. If a new thermostat doesn't resolve engine temperature problems, the cooling system needs to be checked for other issues.
» LEARN MORE: Signs of a bad thermostat, and how to fix it
When the engine coolant temperature sensor fails, it will send inaccurate information to the vehicle’s computer, causing the computer to react to false operating conditions. This will cause the engine to consume more fuel than normal, depleting fuel mileage, and causing black, sooty smoke from the engine under moderate to heavy acceleration. The check engine light will illuminate, and on-board diagnostic trouble codes may be stored for exhaust and emission system failure, fuel delivery system failure, and engine cooling system failure. Overheating may also occur, as the coolant sensor may be leaking fluid out of the engine, creating a an air pocket in the system.
When the radiator fans stop functioning properly, the engine temperature will rise. The spike in temperature will be highest when the vehicle is idling at a stop, but should subside once the vehicle begins moving again.
Additionally, the air conditioner typically won't blow as cold. This is because the air from the radiator fans also blows across the air conditioning condenser, so when the fans fail, both systems suffer.
You'll also usually see the check engine light and notice a drop in fuel economy. It's possible the fan will start making noise if it's failing, as well.
When diagnosing a non-functioning radiator fan in a 2018 GMC Terrain, it's crucial to follow a methodical diagnostic approach that emphasizes simpler checks before tackling more complex issues. Start by examining the fuse linked to the radiator fan, as a blown fuse is a common and straightforward problem that can prevent the fan from operating. If the fuse is intact, the next step is to inspect the relay, which controls the power supply to the fan; a faulty relay can disrupt this flow. After confirming the relay's functionality, test the fan motor directly by applying power to it; if the motor spins, it indicates that the fan is likely in good working order. Following this, check the temperature sensor, which is essential for activating the fan; ensure it is functioning correctly and sending accurate signals. Additionally, inspect the wiring for any signs of damage or loose connections that could hinder power delivery. Finally, confirm that the coolant levels are adequate, as insufficient coolant can also lead to fan operation issues. By adhering to this structured approach, you can effectively diagnose and resolve the radiator fan problem in your GMC Terrain.
When troubleshooting a non-functioning radiator fan in a 2018 GMC Terrain, it's crucial to consider several common problems that could be at play. A faulty fan motor is often the primary suspect, as it can fail to spin, leading to overheating. Additionally, a blown fuse in the fan circuit can interrupt the power supply, rendering the fan inoperative. Inspecting the fan belt is also essential; if it is broken or damaged, the fan will not operate correctly, which can exacerbate cooling issues. Another critical component to check is the temperature sensor; if it malfunctions, it may not signal the fan to activate when necessary, resulting in inadequate cooling. Lastly, a coolant leak can lead to engine overheating, which may affect the fan's performance. Addressing these issues promptly is vital to prevent further engine damage, making it important for DIYers to systematically evaluate each potential problem.
Repairing a non-working radiator fan in a 2018 GMC Terrain is an urgent matter that should not be overlooked. The radiator fan is essential for regulating the engine's temperature by dissipating heat generated during operation. When this component fails, the engine is at risk of overheating, which can lead to severe damage, including the failure of the cylinder head gasket and potential harm to pistons and cylinders. Additionally, overheating can degrade engine oil, further complicating the situation and leading to costly repairs. Ignoring the signs of a malfunctioning radiator fan can result in catastrophic engine failure, making it imperative to address the issue as soon as possible. For DIY enthusiasts, understanding the urgency of this repair is crucial to maintaining the vehicle's performance and longevity, ensuring that the engine operates within safe temperature limits.
Read about related problems experienced by other GMC Terrain drivers like you.
See what others are asking about their GMC Terrain. Get answers from RepairPal's community of auto experts and enthusiasts.
