Q: Rumbling when coasting - 2007 Chevrolet Trailblazer

asked by on

When coasting i just started hearing a low rumbling or humming sound. could this be a wheel bearing issue? It seems to be louder after i stop accelerating, but im not sure if thats because of the sound of the engine decreases. it only starts above 20 mph and stops when i slow down to a stop.

My car has 137000 miles.
My car has an automatic transmission.

Hello. A wheel bearing going bad will definitely cause a rumbling or droning sound as you describe. This will generally get worse as you accelerate as more force is exerted on the bearing and it is caused to turn faster. The sound may be more pronounced as you slow down simply due to the lack of engine sound. To get this checked, I would recommend having an expert from YourMechanic come to your location to inspect the sound and replace the wheel bearing if necessary.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Rumbling when coasting - 2007 Chevrolet Trailblazer

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car acting up and it’s shaking and stallings

Hi Lidia. Thanks for writing in to YourMechanic.com today. In most cases, what you are describing is caused by motor mounts that are worn out, tires out of balance or wheel bearings that are damaged and need replacement. Due to...

Q: My car jerks when decelerating or cruising in slow speed.

Hey there. This may be a sign of a dirty or failing mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to...

Q: Damage to rear Differential? 1994 Chevrolet K2500

Hello - while you are correct that this is not an ideal scenario, I doubt that packing the bearings with a lithium grease like "Red & Tacky" is a long-term issue. Not sure where R&T gets a bad rap as...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...