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SUVs Chevrolet Suburban & Tahoe Chevrolet Suburban and Tahoe AC and Climate Control Questions
136 messages, Last post on Nov 05, 2009 at 9:24 AM
You are in the Chevrolet Suburban & Tahoe Forum. Your Hosts are steve_ & tidester
It seems when I'm stopped at a light, sign, or wherever, but in gear, I get a load vibration under/behind the firewall. A GMC deal informed me of a Tech bulletin as the HVAC/exhaust was part of the problem, but a $130.00 for clamps and $80.00 for labor(my GM extended warranty wouldn't cover it either). would do the trick. I checked the exhaust system and it was NOT vibrating, so that was out. As fo the HVAC, ?? So, I read a post by Arrie on adding a can of oil treatment to their Tahoe's AC system due to compressor noise. I'll see how it works, hopeffully it does as the vibration is load at times. Anyone else have issues like this?? 
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Replying to: kiawah (May 10, 2008 5:41 am) i know blower , but there is a black electrical box that seems to be the area the ticking is coming from it is in the back up and towards the third seat under the side cover .....what is it called? Thank you , 96gmcburb
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Replying to: 96gmcburb (Jun 02, 2008 6:21 pm) There is the blower motor, with a resistor bank in that housing, which is what drops the blower speed to lower voltages and slower blower output. The resistor bank is cooled by the air flowing thru the blower motor. There are a couple of relays, which switch the resistor in and out, slowing the speed. Further up, as I recall about half way, is a plenum mixing door which is basically adjusting the temperature by adjusiting how much air goes across the heater/ac coils. Also as I recall, all the way up in the plenum output by the 2nd seat door, is a sensor which is what it determines to monitor the output temperature of the air. I had a situation once where the blower was running all the time, turns out it had a bad relay (in the back controlling the blower motor). That was replaced by the dealer under warranty, I don't remember if there was a TSB on it or not. If you hear clicking back there, it is most likely the relay controls. |
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rear air not working at all front works great .I checked fuses under hood and dash .Just need some help
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Replying to: hand3 (May 29, 2008 4:15 am) Thanks |
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Replying to: dwalton1 (Jun 09, 2008 12:11 pm) |
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I have a 2007 tahoe LT3 that I bought in October 2007. In Dec 2007 the readout on the dash (where you can view the odometer or the tire pressure etc) went haywire. Instead of the usual stuff it displayed some random numbers and was stuck on that screen. 20 minutes later it suddenly started working fine. I brought to dealership and they said nothing was wrong. My XM radio will go out briefly now and then and I don't live anywehere near tunnels, mountains etc. I could be in the middle of a parkinglot and suddenly lose reception. This is weird becuase XM is sattelite. Now for the bigger issue: Around March I noticed that the blower speed seemed to fluctuate without me touching a thing. I would set the fan speed to a middle setting and then while driving it would go up and down. I called the dealer and they told me to turn on the max air/recirulator button that would fix the problem. It didn't fix the problem so i dropped my tahoe off at the dealer. They kept it overnight and told me everything was fine. They said that if the fan speed was having problems there would be a code and they didn't find any codes... Now it's late June, 2008 My fan speed fluctuates wildly while driving(i never use the auto function). The Max air/air recirculator button will turn off on it's own!!!! I called another dealership and they said it could be a problem with a blower resistor or the control head BUT the only way they can replace those items is if the onboard computer shows codes indicating those items need to be replaced. ANY help ior suggestions would be greatly appreciated. You can also email me at jjdavis49  sbcglobal.net
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I have a 2002 Chevy Tahoe that when you put the ac or the heat on and step on the gas you hear this really lound like clicking noise. You let off the gas and the truck idle and there is no noise. The air comes out cold as ice and the heat works great as well. I had a mechanic look at it and he suggested changing the tensioner and the belt or it might be the compressor. I changed the tensioner and belt and the problem still remains. Does it sound like the compressor? Has anyone else had this same problem? Mechanic stated it will cost $500.00 to replace? Does this sound correct?
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Replying to: natale (Jun 25, 2008 3:24 am)
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