No sound coming from the radio, is it a failing amp issue

No crank at all/nothing/nada:

Could be a blown fusible link, the starter, starter relay, park and neutral switch and ignition switch assuming the battery and connections are good.

Have you checked the amp fuse?

My guess is the blower resistors. High speed doesn't go through the resistor circuit, but, the lower speeds do.

Welcome to the forum, thanks for the donation. Just because the radio lites up, doesn't mean it is functional.
I looked at your wiring, I didn't notice the bcm having anything to do with the radio.

That picture came from the12volt.com, it's a stereo site, among other things. I have no connection to them. I'm not stereo person. Have a good day.

"Doesn't work" can mean a dozen different things. With no actual symptoms to analyze, I can only suggest that since both items are in the same area, they likely share a common ground connection and that could be loose or corroded.

Excellent information. Please feel free to come back to the site with your automotive repair questions. We are here to help!

I will add my $.02 to this thread.

The OEM amp "tells" the head unit to put out pre-amp signals when the amp is connected with a resistor.

There is an aftermarket "Bypass harness" available that will allow the head unit to drive the speakers directly, Mine happened to swap the front and rear speaker assignments. Try that first.

Chimes are played through the left front speaker.

Old door speakers are suspect if they are scratchy. You can easily get water in the doors.

Aside: On the 2000 Impala for sure, there is a dealer part available for about $5.00 that prevents water from getting into the passenger carpet area through the cabin filter. Slight cutting is required. It's a 20 minute install if the cowl is in good shape. If not, the wipers have to be removed and the cowl molding replaced, fixed and or painted.

Some years, the 2000 is not one of them, does have the corroded connection near the passenger seat pillar.

You do need to check that the radio at least display wise works. It pretends it's tuning a station, raises volume etc. Be sure the customization controls work. E.G. Tire monitor reset and Oil use reset, door lock mode, light mode etc. Make sure at least one works.

So far, radio appearing to work:
Check rear and front speakers using fade/balance one at a time.
Install a bypass harness. That should make the radio work and might flip the front and rear speakers,

I actually used a "speaker toner" to make sure the speakers worked with the amplifier disconnected. Inject a signal at each pair of speaker leads.

I actually used a $20.00 USD oscilloscope, the DSO150 to make sure the proper levels were getting to the amplifier with the AMP connected and the radio set to a good strong station. I would set say right front only on the radio and identify a signal on each of the speaker leads relative to ground.

It's my feeling that there is a "systemic" problem in the remote turn-on circuit that initially presents itself as a thermal problem. The radio will work depending on the "trunk" temperature. It will then finally fail with all channels dead. My analysis of the amplifier circuit, there is no protection against transients for the AMP or the Remote Lead.

Once I can get one on the bench I'll know more.

I did replace turn-on transistor and the amp stopped working when the car was jump started.

One company on the Internet will not repair some of the models of AMPs that will fit.

The 2000 and 2001 can be the same for the Impala. The 2001 to 2005 uses a different power connector. The pins are smaller.

It's a "problem child". Hopefully, I can eventually engineer a fix.

The amplifiers employ "notch filters" which probably dampen resonances in the vehicle.

Regards,

Keepitsimple1