I have a 2004 Trailblazer Ext V6. A couple of weeks ago when I cranked the truck there was a terrible squeaking noise from under the hood. The noise continues during acceleration with no change in sound. A really loud squeak. This continued for 2 weeks until yesterday when along with the squeaking there is a terrible clunking sound as well. Sounds like something is going to fall out. No kidding. When looking under the hood and listening for the source of the sound I noticed that the fan is very wobbily. Any suggestions on what this could be? I don't want to just start trying to replace everything in that area. I am not a mechanically inclined! LOL Please help! Any advice would be greatly appreciated.