So in my 07, the driver side seat, doesnt heat up. The heated seat button, when you press it, it flashes.. Passenger side works just fine.
Where do I start on tracking down the issue? Thanks!

 

The LS model didn’t have the heated seats option, are they a factory set taken from a LT , are all the parts factory?

https://www.google.ca/search?q=2007+...&bih=626&dpr=2

it could be a faulty switch or temperature sensor

 

That's what I have is an lt, they are stock heated leather seats.

Is there a way to test those?

 

The same way you check any electric heating element; continuity.
The connector is under the seat.

 

thermocouple inside.
it is a relatively fragile thread.
Of course, it is protected from kinks - but it will only withstand your ass (wide spot of contact). But if you often step your one knee on the seat or your child likes to jump on it - the thermocouple can be broken.
Just peel off the leather cover and evaluate the damage to the touch and visually.
Find a broken place - replace the thermocouple, it's not expensive. If you don’t find a broken place - test the power supply.

 

The person who had it before us was a bigger person, along with I used to be a bigger person. Add in they didnt take care of the car.. I'll order a seat set, hog rings and hog pliers, swap out the thermal.

 

And inspect for loose connections under the seat

 

I cant seem to find factory replacement thermals, under 2xx.xx each. Wonder if I could adapt universal ones to the factory wiring.

 

Someone just posted universal heated seats recently.

a link in here post #20

https://www.chevyhhr.net/forums/mods...s-60921/page3/

 

I would 100% rule out wiring and switch issues before ordering anything this adventurous....