2007 trailblazer flasher location - 2006 Chevrolet Trailblazer

I'd be checking the fuses first. The turn signal flasher should be in the inside fuse panel.

change the emergency flasher

No it would not ! you probably have a 2-3 Shift Solenoid (SS) problem !
You trailblazer has Vehicle Speed Sensor (VSS) located on the tail shaft of the trans . this sensor supply's info to the PCM for vehicle speed . Your trailblazer also has a Input Speed Sensor (ISS) if this were bad it would cause erratic shifts all gears ! Does your vehicle have a check engine light lit or any other type light like a yellow wrench or service vehicle soon ? Your best bet is to take it to AAMCO or some other ASE certified repair facility !

Find your control center most now are located under the hood on the driver side of the fender well..it is normally a plastic box with a lid and latches. OPEN IT THE FUSES S
And FLASHER WILL BE MARKED..GOOD LUCK..

turn on hazard flasher.listen for ticking under dash.turn flasher will be right by it.

Take the switch for the hazard flashers and jiggle it, ....up and down,..... a lot. Somtimes the contacts get dirty.

I think most probably the flasher is the cause. It is blinking or to sya working in time intervals. Also check the car's Hazzards.

If you are looking for the old style flasher, it's not there. It's now called a combination flasher module (more $$) and usually it's on the right side of the column under dash. If you buy one first, at least you will know what it looks like.