2010 Chevrolet Avalanche AC/heater

Tiny
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  • MEMBER
  • 2010 CHEVROLET AVALANCHE
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 35,000 MILES
They ac was working just fine I. I made a stop at a store and when I started the car again the ac was making a loud rumbling noise like it was trying to hard or something was stuck inside. I turned up the heater to help isolate the problem but it is the same result in bot heat and ac. I am thinking it is the blower motor or the resistor relay but not 100% sure.
Wednesday, June 25th, 2014 AT 7:35 PM

7 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Is the noise coming from the passenger side under the dash?
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Wednesday, June 25th, 2014 AT 7:55 PM
Tiny
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  • 4 POSTS
That is what it sounds like. I can feel a slight vibration when I place my hand in that general area. It also gets louder and I turn the ac to its higher fan setting.
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Thursday, June 26th, 2014 AT 4:07 AM
Tiny
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  • MECHANIC
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Either something has come loose or the fan motor is bad. Since the vehicle is so new, I would try to get consideration from GM because part of the dash needs removed to access the motor.
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Thursday, June 26th, 2014 AT 7:04 PM
Tiny
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Thank you very much. I have one last question is it just the bottom part of the dash near the floor or will the upper dash need to be removed also.
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Thursday, June 26th, 2014 AT 7:55 PM
Tiny
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  • MECHANIC
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If you remove the lower section and the glove box, you MAY be able to get into it. Not sure where you live, but there is even a chance that some mice got in there and built a nest.

Let me know how things work out for you.
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Friday, June 27th, 2014 AT 8:02 PM
Tiny
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Thanks for the assistance. It was just some tape in the impeller and the foam o-ring and gotten twisted in it as will. It was simple and effortless to correct.
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Monday, June 30th, 2014 AT 7:52 AM
Tiny
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  • MECHANIC
  • 110,176 POSTS
Glad you got it fixed.
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Monday, June 30th, 2014 AT 9:13 PM

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