Why does my radio say Loc
James Bradley
Updated on April 01, 2026
If your radio displays the word LOC, you can retrieve a set of factory numbers in the radio that enable you to get a backup unlock code. If the radio says INOP, you will have to leave the key in the “ON” position, or let the car run for at least 1 hour before you attempt any unlock procedure.
What does loc mean on a stereo?
Tech Talk: Choosing the Right Line Output Converter (LOC) for Your Install – DD Audio. Motorcycle Audio.
How do I unlock my GM radio?
Dial 1-800-537-5140 to connect with GM’s toll-free radio hotline. Once you’re connected, you’ll be asked to provide your vehicle’s radio identification number, along with a special dealer access code. You’ll then be rewarded with a 4-digit retrieval code, which will allow you to unlock your radio.
What is Loc FM radio?
LOC is for local or DX (distant) frequency handling. AF is alternate frequencies. This allows the tuner to re-tune to a different frequency providing the same station when the first signal becomes too weak.Do I need a LOC?
You do not need a LOC, a decent amp will accept high level inputs from the speakers. The signal from the stock stereo is pretty clean, you can just tap into the right and left speaker wires from the back of the stock stereo and run those to the amps (high level input.)
How do I unlock my car radio?
- Call your car manufacturer directly. Your car manufacturer’s phone number is in your owner’s manual. Ask to be connected to the support department. …
- Enter the code and unlock your stereo. Use the code you received from the manufacturer to unlock and and activate your car stereo.
Is my car single or double DIN?
Single DIN or Double DIN Radio If it measures roughly 7 inches long by 2 inches tall, then it’s a single DIN head unit, and you have to replace it with another single DIN unit. If your radio measures roughly 7 inches long by 4 inches tall, then it’s double DIN.
How do I find my Vauxhall radio code?
Unlock the radio in your Vauxhall car or van from the fourteen digit serial number beginning with GM. You will find the serial number engraved into the casing of the radio. Our online service is available from 9 am to 9 pm or to get your code by telephone call 020 8243 8962 from 9 am to 9 pm Monday to Friday.How do I retrieve my radio code?
You can visit your manufacturer’s website to retrieve the code. Remember, you’ll be asked to provide proof of ownership, VIN number, and device serial number before you can be able to retrieve the code.
How do you turn the AF off in your car?Make sure the radio is in DAB mode, then select the “options” button at the bottom right of the screen, then in “Service Following” select “off”.
Article first time published onWhat is TA and AF on a radio?
Alternative Frequencies (AF) continuously retune the station to the strongest signal in a network, and Traffic Announcement (TA) provides current traffic information or traffic programs (TP) if received.
What is the AS button on my car radio?
Hit AS, it’ll line up all the stations that come in, strongest signals first. Hit AS again, and you’re original presets are returned.
How much does it cost to unlock a GM radio?
Many dealers will give you your radio code for free, while others may charge a small fee. If your dealer is charging a larger fee, consider calling another dealer or doing a Google search for sites offering GMC Radio codes. They usually charge a small (around $10) fee. Step 5: Start your vehicle and turn on the radio.
How do I unlock my 2013 GM radio?
To unlock the radio in the 2013 Chevy Silverado You will start by turning on the vehicle. You will see the display indication “LOC” which is telling You the theftlock system is activated. Now press and hold the reset buttons 1 and 4 for ten seconds or 2 and 3 if You radio does not have a fourth preset button.
What is high level input on amp?
High level inputs means that you are using the speaker wire leads off of the back of the radio instead of using the RCA connections. You can take the speaker wire connections and use them to send the input signal to the amplifier.
What does a car audio line driver do?
In analog audio, a line driver is typically used to drive line-level analog signal outputs, for example to connect a CD player to an amplified speaker system.
What does double DIN and single DIN mean?
A. D. A standard automobile radio body size. A DIN radio (single DIN) measures 2×7″, while a double DIN measures 4×7″. When factory radio/CD players are replaced with after market units, the DIN standard ensures compatibility; however, new or altered dashboard trim may be required.
Are all double dins the same size?
Are All Head Units the Same Size? All head units are not the same size. Generally, head units come in one of two DIN sizes, known as single DIN head units and double DIN head units.
Are all car stereos universal?
Not all car stereos are universal. Many are made purposely to fit a particular car. … This will allow you to determine the make, model and year of your car and if we have a custom fit car stereo to match!
Why do cars have radio codes?
Many car audio systems (car radios) have a so-called ‘radio code’ number which needs to be entered after a power disconnection. This was introduced as a measure to deter theft of these devices. If the code is entered correctly, the radio is activated for use.
Can you reset a car radio?
Remove the faceplate from your car stereo. Press the RESET button on the front panel using a pointed object, such as a ball-point pen.
How do you take theft lock off radio?
- Use an original key (not a copied one) and insert it into the ignition.
- Turn the key into the “On” position. …
- Leave the key in this position for 10 minutes until the “Theft System” light stops flashing and goes off.
- Flip the key into the “Off” position and leave it there for five seconds.
Why does my radio not work after changing battery?
The most common reason for a car radio to stop working after the battery has gone completely dead is that the radio has an anti-theft “feature” that kicks in whenever battery power is removed. When that happens, all you have to do is enter the right car radio code, and you’re back in business.
What does TP mean on radio?
Updated 7/22/2018. This function allows traffic information that is broadcast within a set radio station’s RDS network to break through. The TP symbol indicates that the function is activated.
What does TP mean on Ford Fiesta?
The related TP (Traffic Programme) flag is used to allow the user to find only those stations that regularly broadcast traffic bulletins, whereas the TA flag is used to stop the tape or raise the volume during a traffic bulletin.
What does no Pty mean?
Certain stations broadcast their call letters or formats. NO PTY means that the data is unavailable.
What is af in audio?
AF (audio frequency) (also abbreviated af or a.f.) refers to alternating current ( AC ) having a frequency such that, if applied to a transducer such as a loudspeaker or headset, will produce acoustic waves within the range of human hearing. The AF range is generally considered to be from 20 Hz to 20,000 Hz.
What is AUX button?
Aux is short for auxilery, in this case meaning external. The aux port could be input or output; it could be where you plug in external speakers(sound bar? u to the TV, or where you plug in your iPod to play music through it. The aux button should switch your TV input or output to where it uses the aux plug.
What does the AS button do?
Automatic start-stop is a system that shuts down the engine when the vehicle is stationary. For example, when stopped at a red light or when stopped in congested traffic.
What is AUX on key fob?
Press and release the “AUX” button to operate in “Silent Mode.” This stops the horn from sounding and the lights flashing to confirm activation of the alarm.
How do I reset my radio in my Chevy Silverado?
To reset the radio in your 2015 Chevy silverado vehicle, turn the ignition key to the “on” position and turn your radio on, wait ten seconds and then turn your radio off. Depress radio power button again and wait for reset.