Last post on Dec 26, 2012 at 5:10 PM
You are in the Chevrolet TrailBlazer
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Chevrolet TrailBlazer, SUV
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#412 of 660 Re: 2005 Trailblazer A/C Starts Out Hot! [briankrusze]
Jul 22, 2007 (7:30 am)
I replaced the clutch in my 2002 TB last year, and the AC has cooled great ever since. Took me about an hour and a half to do it myself.
The fan clutch has been known by GM to be the cause of poor AC performance for over 2 years. I've posted the first few lines (below) of the service bulletin issued in June 2005. Perhaps documenting it will help you get some help and resolution. The clutch can be bought for less than $200 but parts and labor has been known to run upwards of $700.
Document ID# 1671108
#04-01-38-019A - (Jun 7, 2005)
Intermittent Slow to Cool HVAC Performance Concerns in
High Ambient Temperatures and/or High Humidity
Conditions After Start Up, Especially at Low Engine
Speeds (Install New Engine Cooling Fan Clutch)
2004-2005 Buick Rainier
2002-2005 Chevrolet TrailBlazer Models
2002-2005 GMC Envoy Models
2002-2004 Oldsmobile Bravada
2005 Saab 9-7X
Some customers may comment on slow to cool Air Conditioning (A/C) performance or high A/C outlet temperatures after startup or that the A/C system is not cooling sufficiently, especially in high ambient temperatures. This may be an intermittent condition and the performance of the Heating, Ventilation and Air Conditioning (HVAC) system may not meet customer expectations.
Replace the EV fan clutch.
#413 of 660 fan speed to high? Please HELP!!!
Jul 22, 2007 (8:58 am)
Hi I have an 02 TB and the engine is making a loud noise as if it was pulling 5000 pounds up a hill with the AC on. You know how it sounds when you first turn it on in the morning when its cold out and you rev the gas up and makes a loud nioce and after it warms up its quiet again, well mine sounds like that all the time and the SES light is on so I took it to Autozone and the little computer reader thing said that the fan speed is to high. What does this mean and what can I do please help me? Thank you very much for your time,
#414 of 660 Re: fan speed to high? Please HELP!!! [rcrg81]
Jul 23, 2007 (6:12 am)
Fan speed too high means most likely that the EV fan clutch is locked up and needs replacement. Fan speed is not what the computer is commanding it to be, so the SES light is on as a warning.
#415 of 660 Re: fan speed to high? Please HELP!!! [rcrg81]
Jul 23, 2007 (7:58 am)
This clutch situation is out of control...Is there a way to force a recall?
#416 of 660 Re: fan speed to high? Please HELP!!! [briankrusze]
Jul 23, 2007 (12:38 pm)
I doubt if this would be a safety related issue, so the chance of a recall would be remote.
#417 of 660 Re: Service Engine Soon & reduced engine power sensors [laurie22]
Jul 23, 2007 (9:35 pm)
i have a 04 TB, IT STARTED HAVING REDUCED ENGINE POWER LAST WINTER IN THE MORNINGS BUT NOW IT HAS STARTED DOING IT EVERYDAY AND IT IS THE MIDDLE OF JULY, IF I LET IT WARM UP IT IS FINE,(WHICH THE REDUCED ENGINE POWER LIGHT IS ON THE WHOLE TIME IT IS IDLING,) BUT THE SERVICE ENGINE LIGHT STAYS ON FOR A COUPLE OF HOURS, THE DEALER WANTS TO REPLACE THE COMPUTER(800.00) ANY SUGGESTIONS BEFORE I DO THIS
#418 of 660 Re: 2005 Trailblazer A/C Starts Out Hot! [tblazed]
Jul 23, 2007 (10:14 pm)
Any special advice to replace fan clutch? Tools?Remove fan shroud only?
#419 of 660 Re: 2005 Trailblazer A/C Starts Out Hot! [shadetree9]
Jul 24, 2007 (6:17 am)
There's more to replacing the clutch than is practical to go into here. Yes you need a clutch tool and a big wrench to get the clutch off the water pump shaft. You also have to drain the radiator part way to take the upper radiator hose loose to get it out of the way, remove a few bolts, unhook the shroud, and lift the whole fan-clutch-shroud out all at once. GM did not make the job easy. (If they had used a two piece fan shrowd like on my '88 S-10 it would be very easy, but they didn't.) If you do a Google search you should find a lot of info about doing this yourself.
Jul 29, 2007 (7:26 am)
I have a 2003 Trailblazer I have a ticking noise coming from the front of the engine. I am not sure if it is one of the pulleys. It has 32000 miles onit. Has anyone had this trouble before.
#421 of 660 Re: 2005 Trailblazer A/C Starts Out Hot! [tblazed]
Jul 29, 2007 (9:22 am)
Wiring problem in 03 fan clutch. Thanks much for the info Tblazed, I was set to replace the fan clutch when I found the black wire on the wiring harness plug was not making connection. I connected a jumper wire and now the temp is normal, ac works, and I saved hundreds of $. I hope this helps someone else.