I recently put a new engine in my car and now the radio doenst work.It worked great before,I check everyfuse,wiring.and it still wont turn on.all I get is the power light stays red and nothing happens..at all.and the instruction manual made itself scare.
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Depending on the model, the Silverado may have an amplifier between the OEM radio and the speakers. If that is the case, you will have to remove it and wire directly to the speakers. Check the wiring schematics for the original truck radio option (one source is Alldatadiy.com).
1. Check the fuse at the radio and in the vehicles fuse box
2. Check the wiring of the radio to ensure nothing has come loose/disconnected
3. Remove the radio and test it on another power source to ensure it is working properly.
If it's not the fuse (Step 1) I recommend visiting a quality local Car Audio specialist and getting them to assist you.
First check the wiring to the radio. You may measure the power being ok but you also need to make sure the ground connection is ok.
If this is all ok it may be that you have dry solder joints on wiring socket inside the radio or a blown track or protection diode.
It sounds like the antenna wire may have come loose from the radio or the antenna - would be worth checking. Just remember, if you can't get in behind the radio, and you have to pull it, don't disconnect the wiring harness, or you'll need an unlock code to make the radio work again.
reinstall the factory radio use a digital volt meter to see witch wire supplies voltage when radio is turned on and off, note placement on harness then verify this wire is hooked up on the output side aftermarket harness you may have to jump it to get the maps to turn on. tip you can carefully pull unused wire from harness example (dimmer wire orange white) and move it to the position needed to keep it a clean install .
easiest thing first. check the fuse on the hot wire on the radio harness. next, check to ensure the hot wire is to battery power, and the acc (likely yellow or orange) is attached to a wire that turns on with the ignition. next, check to ensure good ground. all this should take less than 10 minutes.