Speakers not working

fade setting?

Nope, speakers are protected by the radio fuse, so if the radio works and one speaker works, then the fuse is good......it could be loose/bad wiring, bad radio unit, or blown/inoperable speakers.

Hope this is helpful :-)

-Scott

There can be a lot of causes of the problem, and it is difficult to diagnose. Can be:
- a bad speaker coil
- a bad wire connection at the back of the speaker
- a bad connector connection or broken wire in the wiring between the speaker and the amplifier/radio
- an intermittent problem in the amplifier/radio.
To try to fix the problem, start at the speaker (check the connectors, try a different speaker) and work back.

Highly doubt it. I would hook up a speaker that you know works to the connectors in your GMC and see if that speaker works. I ran wires from the connectors of my vehicle to the trunk speakers of another vehicle(because the are easy to get to). If the speakers of that vehicle works, then you know you have bad speakers in your GMC.

have you tried connecting directly to the radio? I would suspect a broken wire or a bad fader control or switch depending on the model.

First thing i'd do is to open up each speaker location and hot wire a working speaker to the leads (can be any speaker...from an old house radio etc as long as you know it works). If your test speaker works then the one in the car is bad. If you can't find anything there, then you can remove the radio and attach the test speaker to the actual harness. If you have power there and speaker works, then the wiring to the speaker needs to be tested. If it does not work you need another radio (cheaper than a repair.)

Remove one of the non-working ones and attach any one you have that works. If it works then the speaker is blown. If you don't have a speaker, turn the volume down and use any earplug but don't put in your ear.

try different speaker if works .its the speaker. if another speaker does the same .your radio is the problem.

when mine stopped working,the right speaker, i removed the door panels then swapped the speakers. and still the right speaker didnt work. so i got a radio from a junkyard and installed it. and now all speakers work fine.

Sir,
I do not want to insult you in any way, but I must ask just in case it was overlooked! First check to be sure that the speaker settings on the stereo were not set all the way to the front. If that is not the problem, you can hook another speaker you know works to the wireing to the rear speakers to check to see if it is the speaker or the wireing. If you hear sound from the speaker you know works, then your speakers in the car are bad. If you do not hear sound, then it will be from the wireing. Next is the more difficult part. You will have to pull the stereo out and can splice into the wires. Hook the good speakers up to the splice and check for sound. make sure you know for sure the wires you splice into are for the rear speakers. If you still hear no sound, then it is more then likely a problem in the stereo itself. If you do hear sound then there is a problem in the wireing somewhere and may be easier to just run new wires to the rear speakers.