What does a GMC Envoy thermostat do?

The job of your Envoy’s thermostat is to regulate the temperature of the engine. It does this by allowing water to enter the engine when it is getting hot, and by keeping coolant from entering while the vehicle warms up. Sometimes when a thermostat goes bad, it stays stuck open. This allows the coolant to continuously enter the engine.

What to do if your GMC Envoy heater stops working?

At this point, the blower motor blows air across the it and the newly heated air blows on to the driver and passengers. If the heater has stopped working in your Envoy, this process has failed in one way or another. A word of caution: If there is no coolant in your overflow, you can refill it by adding more to the overflow reservoir.

What happens when the water pump fails in a car?

When the water pump fails or is beginning to wear out, it can lead to complete engine failure. When the water cooled (as opposed to air cooled) engine was introduced, many automotive experts believed that the water pump circulating coolant through the engine block was just as critical to engine protection as oil.

Can a mobile mechanic diagnose a faulty water pump?

There are some vehicles that will not allow you to see the water pump without removing the timing cover and this is a lengthy process. If this is the case with your vehicle, it is best to have one of YourMechanic’s certified mobile mechanics look over your car for proper diagnosing.

How to tell if a car’s water pump needs replacement?

How to Tell if a Car’s Water Pump Needs Replacement. Your car’s water pump is an important part of your vehicle. It is the part that continually pumps coolant to your vehicle’s engine so that it doesn’t overheat.

When does a car water pump warning light come on?

Notice if your temperature warning light comes on. If your car is not circulating enough coolant due to a leaky or malfunctioning water pump, your engine temperature is going to increase, triggering the warning light.

How can you tell if your water pump is going bad?

Start your car’s engine with the hood up. If you hear a low-pitched grinding noise, it may indicate that your water pump bearing is going bad. You can often hear it plainly if it’s gone bad.