Where is the blower motor relay located on a 2007 chevy trailblazer

Blower motor relay ? Near the blower motor on the resistor assembly. Under the right side of the dash .

sounds like a blower motor relay or control module. have it check first with your mechanic as the part for your car is expensive. goodluck

Could be ! could also be the blower motor is bad or blower motor control module .
Does you buick have manual or automatic climate control ? There is a fuse box under the rear seat ,that is where fuse is for blower motor .HVAC BLWR fuse 40 amp. Chevy Trailblazer EXT Blower Motor Won Turn Off

Should be in the underhood fuse/relay panel. These dont often fail.

The fan relay is the problem. Replace it.

Have you checked to see if the blower relay is stuck on ?

This not the relay, the problem is probably the blower motor resistor pack or the wiring connector for it. These are located near the blower motor behind and below the glovebox.

Sounds like the blower motor either wore out, or the relay is bad for it.

Good luck on this repair.

replace the relay for this motor if you are talking about the heater blower. The contacts in the relay have fused together.

on the right side of the instrument panel right next to blower motor.