Question about 2004 Chevrolet TrailBlazer

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Humming noise between 40-50 mph

I have a humming noise between 40 -50 mph regardless if I am driving in D or L4 in my Equinox 2006 LT

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I experienced something similar, loud humming/truck like sounds only at highway speeds, turned out I had a cracked rotor.

Posted on Dec 17, 2009

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Tire shape ,wheel balance.any leakage at wheels.

Posted on Oct 02, 2009

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1 Answer

How TO bleed coolant system on 2006 equinox lt


Fill the coolant to hot full. start it and get it to operating temperature, watch the tank because when the T stat opens the coolant tank will drop. Fill it hot full again, maybe just an inch or so over full. put the cap on. What I do is find a parking lot and drive around in circles( as fast as you can, 15 MPH is what I try to hit), left , then right. Doing this purges the air out of the heater core. It has worked on every car I have done. Even the impossible Ford taurus's

Jun 04, 2016 | 2006 Chevrolet Equinox LT

1 Answer

2008 Equinox has excessive road noise between 45 & 55 mph. Loud in general but really loud at speed.


Road noise is usually related to your tires. I would go to a tire shop and have them check it out. If your alignment and tire condition in general are good it might be the stiffness or aggressiveness of the tread.

Nov 23, 2015 | 2008 Chevrolet Chevrolet Equinox LT

1 Answer

There is a grinding noise from the front of the vehicle while driving. All new brakes. The wheel bearings have been checked and are fine.


Is it more like a vibration and humming, than grinding noise? If so it would be a bad engine or transmission mount. To check bearings while driving.. Find an empty parking lot, Make right and left turns/circles. Making a left, if the noise get loader, the right side bearing is bad. and vice versa. Do around 10 MPH while turning circles.

May 12, 2015 | 2005 Chevrolet Equinox

2 Answers

Humming sound at 40 mph when i let off the accelerator 2006 toyota tundra then goes away after a few seconds


Could be a Wheel Hub Brg Assy, on front

If you remove the caliper & rotor .You may
feel the bad bearing by hand

No other test than what your hearing around 35 to
40mph.

Jun 26, 2012 | 2006 Toyota Tundra

1 Answer

When I go over 25 mph I get a clicking noise


Not brakes. Check for something stuck in the tire.
or something loose in the hub cap.

Oct 28, 2017 | 2006 Chevrolet Equinox

2 Answers

There is a humming noise when driving HHR. It


I Think it must be Sylancer Mounting Bracket or Mount Problem

Oct 06, 2009 | 2006 Chevrolet HHR

2 Answers

2006 Dodge Dakota Humming/Whining Noise


could be power steering pump low on fluid

Aug 19, 2009 | 2006 Dodge Dakota

1 Answer

There is a loud noise at 45mph.


Find a quiet empty stretch of road. Go 50 mph, put the trans in NEUTRAL and shut the engine. If noise is still there, swing car left and right to detect noise differences. Could be hub or axle bearings. Not engine or trans if noise is still there. Hope this helps

May 05, 2009 | 2004 Chevrolet TrailBlazer

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