2008 Help restoring to stock setup

[Dale99]

I purchased at 08 Sierra over the weekend. The previous owner had a cell phone device, and possibly an aftermarket sub setup in the truck.

My rear speakers are not working. I have the middle level 6 speaker setup, no bose, no center console.

I removed all the cell phone device stuff that interacted with the stereo, they still dont work.

I looked at the stock harness to see if it was tapped/cut in the radio area, nope.

Where else would be an "easy" place to tap into the rears?

[jimmydean]

Easiest thing is to trace the wires of the speakers that don't work. The rears are likely tied together and run down the drivers side to under the dash. Follow the wires, make sure they are connected still and go from there.

[Dale99]

Wouldnt they separate the left from the right, and channel them down the appropriate sill plate area to the b-post, up the b, and into the rear door jamb? Or thats how I would do it.

[Dale99]

Figured out on my way home from work, the drivers door didnt work either. Tested the radio with a old used speaker, all the channels work. After finding a thread on another forum, 11 pages of people with 08-10's with blown speakers just after leaving warranty. I'm gonna guess these speakers are blown :/