Ask the Car People.SM


Chevy Suburban and Tahoe AC and Heater Problems

358 messages,  Last post on Apr 18, 2013 at 11:37 AM

You are in the Chevrolet Suburban & Tahoe Forum.

What is this discussion about? Chevrolet Suburban, Chevrolet Tahoe, Chevrolet Tahoe Limited/Z71, SUV

    

Messages Page 12 of 37

#104 of 358 Aspirator - TSB/recall? by ahightower

Nov 22, 2008 (2:34 pm)

Regarding the buzzing aspirator, I've come across the following in a couple other forums:
 
Document ID# 1639237
 
Subject: Buzz Noise From Headliner Above Driver - keywords ac air aspirator cover fan grille HVAC interior microphone sensor speaker temperature vent vibration
#PIT3511 - (03/29/2005)
 
Models: 2000-05 Cadillac Escalade
 
2002-05 Chevrolet Avalanche
 
2000-05 Chevrolet Silverado, Suburban, Tahoe
 
2000-05 GMC Sierra, Yukon, Yukon XL, Yukon Denali
 
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in the PI.
 
Condition/Concern:
Dealer or customer may comment that they have a buzz or vibration noise emanating from the headliner in an area that looks like microphone or a speaker.
 
Recommendation/Instructions:
The plastic escutcheon grill, which is round and about the size of a half dollar and located just above the driver to the left, is the interior ambient temperature sensor. The sensor is used in conjunction with the automatic HVAC (C68). On occasions, this sensor has been known to make a buzz or rattle sound. The sensor uses a small fan to pull air over the sensor. This buzz noise may be intermittent.
 
Although it may not be possible to alleviate all of the buzz or noise from this sensor, Engineering has found that if the sensor is installed incorrectly that it may bind and cause the fan to make a buzz noise. Remove the sensor and while doing so check for any binding. Reinstall the sensor and re-test. If the noise is still present, the sensor itself may be noisy and require replacement.
 
===
My question is, is this document a TSB or a recall? Does this mean that a dealer would address it free of charge despite being out of warranty? Mine is a 2005 Yukon XL. I can't seem to find this on any official GM site, and I'd like to have something to back me up when I go to the dealer. From what I've gathered, they will charge about $60 for the part plus an hour of labor. I'm having no luck finding this one GM's own website. Thanks for any help.

#105 of 358 Re: Aspirator - problem solved by ahightower

Nov 26, 2008 (5:29 pm)

Replying to: ahightower (Nov 22, 2008 2:34 pm)
I bought the part from my GMC dealer for $44 + tax and installed it myself in 10 minutes. Just remove the visor (left side only, and you'll need a torx driver, not philips), gently loosen the A- and B-pillar trim, pull back the weatherstripping, and you're in. Pop the grille off with a flat screwdriver, have your lovely assistant gently pull down on the headliner so you have room to work, and then simply unplug the old aspirator and plug in the new one. Snapping the little grille back on was a little tricky. But it's done and it's silent and as far as I know it works. We'll be going to Marble Falls, Amarillo, and Houston over the coming holidays, and I would have gone insane listening to that for 1500 miles! Also glad I didn't wait around the service shop and pay for an hour of labor.

#106 of 358 Re: Chevrolet Suburban & Tahoe: A/C - Climate Control Questions [tidester] by krd120203

Dec 04, 2008 (5:39 pm)

Replying to: tidester (Aug 29, 2006 9:54 pm)
I have an 2003 and my blower is only working on setting 4 and 5. It is blowing at what it would for these two settings. At 0 to 3, the air is just lightly flowing though the vents. What could the problem be?

#107 of 358 climate control on '03 suburban by krd120203

Dec 04, 2008 (5:51 pm)

My climate control is only working on the settings of 4 and 5. from 0 to 3 the air comes through as a breeze. What could be the problem with my system? The blower is working at the correct strength at both 4 and 5, and the rear blower is working just fine in all settings.

#108 of 358 Re: climate control on '03 suburban [krd120203] by arrie

Dec 05, 2008 (9:44 am)

Replying to: krd120203 (Dec 04, 2008 5:51 pm)
I had the same problem with a '02 Pontiac Grand Am and it was caused by burned out blower speed control resistor.
 
In that Pontiac blower fan speed control is done with resistors, i.e. with each fan speed the voltage to the fan motor goes thru a different resistor, which drops the voltage for the motor for a set fan speed. Resistors are located in the air flow duct by the fan, i.e. the resistors that heat up as they lower the voltage are cooled by the air flow that the fan makes. This is why it is the lower speed resistors that usually fail because the air flow is lower. I also think there are more than one speed connected in series so when just one of those burns it takes all of the speeds out that are in that series. I also lost lower 3 fan speeds when it happened.
 
As I said above this writing is with a Pontiac Grand Am but I would not be surprised if your Tahoe would have exactly the same construction for blower fan speed control so look at the air duct around the blower. You might find a small circuit board bolted in the side of it, which has those fan speed resistors built into it. You can probably buy a new one at car part store other than a dealer just as I was able to for My Pontiac.
 
Arrie

#109 of 358 Re: Air flow [bingram] by zigfreed

Apr 19, 2009 (5:12 pm)

Replying to: bingram (Nov 19, 2008 7:40 am)
Did you ever figure out the Air flow problem on your suburban, I am having the same issue.
 
Thanks

#110 of 358 Re: Air flow [zigfreed] by krd120203

Apr 20, 2009 (6:05 pm)

Replying to: zigfreed (Apr 19, 2009 5:12 pm)
I did find out what it was. It is a fan blower resistor. It is located under the glove box. It is extremely easy to fix. I was only able to find the part from GM. Napa did not have it and could not get it for my model year. It took me maybe 10 minutes to take the cover off and switch the part out.
Hope this helps you.

#111 of 358 '00 Suburban AC questions... by suburban68

May 03, 2009 (6:04 am)

Hi all.
I own a 2000 C1500 Suburban.
HVAC equipment is C60 (front, manual control) and C69 (rear, manual control)
As I can find easily used controls on eBay, is there any way to simply upgrade my AC to electronic control? Is wiring pin to pin compatible?
Olivier (from France)

#112 of 358 Re: AC / Heat Noises 2002 Chevy Tahoe [natale] by carlosrubio310

Jul 08, 2009 (5:01 pm)

Replying to: natale (Jun 25, 2008 4:24 am)
I had the same problem. I replaced the ac compressor ( rebuilt) and work good its been about 1 year ago, i did the repairs my self, I spend about $200.00

#113 of 358 fan works on all settings but 5 by sulli031

Jul 08, 2009 (6:00 pm)

I have a 2002 Tahoe and the fan works on blower settings 1 - 4 but shuts down on setting 5. Any ideas what's wrong and how to fix? Thanx.

Messages Page 12 of 37

To POST a message, please Sign In.

Advertisement

Browse by Category

Browse by Vehicle
   View All Vehicles

Browse by Board
Browse by Topic
View All Topics

Edmunds Community

Advertisement