I asked a few mechanic friends of mine. All pretty much said it was the fan clutch by my description. The answer above is really just, terrible. I understand that it is a part that can and does wear out just like any other part. I was really asking, if anyone thought the fan clutch was bad in this case. Oh well. I took it to the dealer since I found out my extended warranty covers it. They said a bearing had gone bad in the water pump and was causing the wobble. This affected the fan clutch, so they both had to be replaced. Good thing that warranty covered it, because the total damage ended up being $891.00. Holy Crap! Normally I wouldn't go to the dealer, but all the other shops charged $550 just like the dealer just to replace the fan clutch. Oh well. The fan clutch failure is related to the silicone inside and parts failing and not allowing it to disengage. The constant roar of air and the sound of a jet engine is common as is the loss of power related to moving all that air all the time. Newest part Number for 2006/7 should be more reliable as these failing components have been modified. A wobble will be a water pump bearing failure. Usually not directly associated with a fan clutch issue but great to hear they replaced both under the extended.
You can absolutely replace the fan clutch on your 2003 Trailblazer yourself. The clutch does not have to be reprogrammed but you do have to wait until the vehicle is completely cool before you begin work. Just remember to re-torque the fan bolts as specified in your manual.
When a clutch fan is always engaged, it could mean that the clutch is no longer working properly and needs to be replaced. If a clutch wears out, then it will make?æthe engine to run hot when idle.
Visit www.trailvoy.com for a complete answer to the fan clutch change with pictures.
How to remove fan clutch on 2003 ford explorer
if fan make a loud noise your fan clutch is bad
how do you check the fan clutch not working on 2003 ram 3500 5.9
If your hear "ticking" and have to use WD40
if you do not have no experience in fixing car, do not do it
replace your fan clutch.
yes you can remove the fan clutch without removing the rad. it is tight but it can be done. it is easier with the Rad removed
It will come off the same as on the 2002. See http://wiki.answers.com/Q/How_do_you_change_a_fan_clutch_on_a_2002_Chevy_Trailblazer_LT ...and keep some bandaids handy.
If your fan clutch is working properly and your thermostat is good then it should not overheat.
I think this has an electric fan clutch. If it does then check to make sure it is bolted on good and if that isn't the case then a wobble would indicate a bad fan clutch.
Sounds more like a thermostat or water pump. The fan clutch locks up when it is toast. Fan will wiggle a bit when the water pump is shot.
Lefty loosey to remove the fan clutch but the fan assembly rotates CCW when the engine is running.
Could be a bad resistor on blower motor
The clutch never disengages. This creates excessive labor on the engine and will destroy fuel economy.
the clutch in the fan is bad. you can spray wd 40 in the back of it but that's temporary. probably need another one.
no clutch fan
Turn the large nut loose (1 7/16") by turning it counterclockwise then spin the fan and fan clutch off as an assembly. Separate the fan from the clutch on the bench.
Could be the water pump or fan clutch hitting the shroud. If you replace one then do both as the labor will kill you to do it again.
Well knowing these trucks as I do you must determine if it is really the temperature sensor that is gone out or if it is the thermostat, water pump, fan clutch or stepper motor in the cluster.
Where are the good wrenches now. Do yourself a favor and buy a Honda or Toyota. Peace