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Re: 2000 4wd blazer makes a loud humming noise
Does noise change when you turn the steering a little right or left going down the road at a steady speed 40-55 mph?
Does it do it more or change under a load or letting up on it coasting/
Have you checked the rear wheel bearings and carrier bearing and u joints?
Any rought treaded tires?
You might want to get a repair shop test drive it.
A good trained ear may be able to spot the noise.
Good luck
MT
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Remember proper testing gives us the answer to many problems.
MT
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