2000 Chevy Tahoe loud noise

BOSEIMMP

MEMBER
2000 CHEVROLET TAHOE
V8
2WD
AUTOMATIC
95,000 MILES

Are you able to tell me how to correct a load noise when I turn the front a/c to high. It makes a loud humming noise like something like a leaf or stick has lodged itself in the blower. I do not know where the intake is for this a/c or how to dis-assemble to correct this problem?

Thank you
best regards,
Patrick imm
boseimmp@msn. Com

10 Replies

RACEFAN966

MECHANIC
5,029 POSTS

OK some info first. Does this noise only happen when you turn on the a/c or does the noise happen in heat modes too? Basicly does the noise come when the blower motor is running in any setting or only when you put it on A/C?

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Tuesday, August 11th, 2009 AT 2:15 PM

BOSEIMMP

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8 POSTS

Also, when vehicle running at idle speed the a/c does not blow cold air. What might casue this problem?

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Tuesday, August 11th, 2009 AT 2:29 PM

BOSEIMMP

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Oh and another thing. If you could please look at;I purchased a Quest ReChill Kit (polar bear on the front) including a recharge hose with gauge handle. I've connect the hose to the car properly, yet after piercing the bottle with the other side of the hose two things happen: 1) it's not tight enough so the air leaks out making the hissing sound; and 2) I tighten it, I hear nothing as if it's airsealed, but nothing is being pumped into the car. In neither case does the gauge move. Is there a simple step I'm forgetting to do? I've reread the directions endless times.

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Tuesday, August 11th, 2009 AT 2:49 PM

RACEFAN966

MECHANIC
5,029 POSTS

Ok first question blower motor is located under the hood it is on passenger side here is a pic of what you are looking for. Just unplug it and unbolt it and remove it check inside for any debri and then check the motor for noise.

Now on you A/C problem your freon is too low for the a/c clutch to engage so it won't take in any freon so on the first can you put in you will need to take a paper clip and jump the low pressure switch. You do this by unpluging it and then put the paper clip in the connector while the truck is runnig with the a/c set on max, you should hear the a/c compressor engage now you can put in the freon. Now after you put in the first can remove the paper clip and plug it back in and see if the a/c compressor will engage on it own. If not you may have other problems and we will have to test the low and high pressure switches. Here is a pic of the low pressure switch I am refering to and a pic of where it is at also on the passanger side of the truck.