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Sounds like you need to input the radio code . i would look in the glove box for the code either on a sticker or a card or ask them if they know about the code .
Instructions Deactivate Theft-Deterrent Feature
Place the key in the ignition and switch it to the "RUN" setting.
Press the volume control knob in to turn the stereo off, if it is not already off.
Press the number "5" and "6" button on the radio
simultaneously for approximately five seconds until four dashes ("- - -
-") appear on the display screen. You must then enter the four-digit
unlock code that you originally assigned to your vehicle. If you are
unsure of the unlock code, contact your local GM retailer.
Press "SEEK/SCAN" upward to set the first number.
Press "SEEK/SCAN" downward to set the second number.
Press "TUNE" upward to set the third number.
Press "TUNE" downward to set the fourth number.
Verify that the code on the display screen matches your
stereo unlock code, then press the AM FM button. You will see "REP"
will display on the screen. Enter your code a second time for
confirmation. "OFF" will appear on the screen, confirming you
successfully deactivated the theft-deterrent feature.
It sounds as though your stereo may be improperly wired, or perhaps there is a blown fuse or exposed wire causing a short. I would suggest checking the wiring diagram for your vehicle/stereo, or taking it to car audio store/ whomever installed the unit, and having a technician examine it. I hope this helps =)
The red light on amplifier relates to power supply while the green light is indication of sound functionality. An amplifier that allows sound to generate should display both red and green lights. Howeever, some amplifiers would display only green as long as the sound is functioning.
Solving the problem
First, a red light still on means the power connections to the amplifier is fucntional least requirng repairs.
Second, the green ligh should turn on once the stereo were tuned up to produce sound. If the stereo is still on only least produce sound on the amplifier, check on the connection wires between stereo to amplifier that may have disconnected due to woofing or dubbing sound generals with unfirm wiring.
hi this sounds like you have connected the permanent live wire to an auxiliary wire, ie, what ever the power source you have connected it to, only works until the vehicle has started, then the power is stopped, sorta like.. say, the starter motor, it only uses the power when it is needed then when it is running it shuts the power off, just like the lights on the dash ect ect, your best bet would be to find a permanent live from the battery supply...hope this helps