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.
replace your fan clutch.
if you do not have no experience in fixing car, do not do it
The ac clutch is held on with a single nut, and can be removed with a remover tool. It the tool will not fit in the space available, then the entire compressor will have to be removed to replace the clutch.
i would leave it alone.
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.
A few weekends ago I had to replace the fan clutch on my '06 Trailblazer EXT LS. In addition to getting the P0495 code from the check engine light, when I rev'd it up it sounded like a jet engine. Instructions: http://www.diystew.com/2006-trailblazer/
Yes
over heat
A picture of the clutch assembly removal process for a 250 Polaris Trailblazer can be found in the repair manual. It details how to access, disassemble, and remove the assembly.
remove all front bolts /4/3 sometimes just one hex in middle pull clutch out save shims add shims to new clutch replace bolts good luck
Visit www.trailvoy.com for a complete answer to the fan clutch change with pictures.
Replace clutch cable on sportsbike