2001 tahoe no sound after new hu

i haven't back probed it yet to see what the voltage is. that was my next queston: does any one know wear the stock amp is located? I think I might just run my other amp if this gets all confusing.

The subs are the only thing that works. I get nothing from the intereior speakers. I assume the amp is no good but I am wondering if their is any common problem with these or a common fix. Do you know wear the stock amp is located?

Look at the red and black plug and try to find (i think) the green wire. that should be your amp turn on. Test it first. Im a test, test, test (before hook-up) kind of guy. It need switched power, not ground. Also, the amp should be under the center console arm rest about mid-thigh and straight down. GOOD LUCK getting to it! It's covered in crap! I think in that vehicle that only the absolute rears are amped though.

You know, also, if you've got a blown speaker or a grounded one, the radio might be protecting it's self. One bad one could be shuting down all your highs. Unplug your harness and test each speaker for resistance on the car side of the plug. If one is bad, cut it out, and plug back in. See if that helps...