Blower resistor is behind the blower motor up against the firewall you can see wires hanging down from it. (Mite be called blower control module in 2005 models.)
It may only be the resistor pack or the resistor module depending upon your climate control type.
directly under the glove compartment
Replace the blower motor resistor.
If you have no speeds at all, including high speed and you have power at the fuse and the fuse is good, I would suspect the heater blower speed switch and or the electrical plug to the switch is cooked. If you have high speed only and the rest are dead, I would suspect the blower motor speed resistor.
There is a fan motor resistor board located under the dash on top of the plastic duct housing on the passenger side of the vehicle. It is behind the glove box. Removing the glove box will help you to get to the resistor. The power to the fan motor uses various resistances on that board to get your lower fan speeds, but on the highest setting it bypasses the resistors since they are not needed. You always will get your blower motor to work but only on high only when the resistor board is bad.
Under the dash on the passenger side you will find the resistor. Remove the two screws and pull out the assembly. Unplug the old resistor and replace. Very simple repair.
do a 2005 trailblazer come with a carentry control
how to adjust the seat memory on a 2005 trailblazer
The 2005 Ford F1 50 pickup truck blower motor resistor pack can be found on the firewall in the engine compartment. The blower motor resistor pack is on the passenger side of the firewall.
It is behind the glove box
will 02 03 04 Chevy trailblazer doors fit a 2005 Chevy trailblazer The body style is the same from '02 to the end of production in '09. Side moldings changed over the years and are just glued on.
There is none