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On my 1999 chevy cavalier my radio theftlock is on and I would like to know how to put the code in the radio. Thanks Terry

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  • Car Audio & ... Master
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The code entry instructions will depend on the actual make+model of radio fitted into your Chevy ( Chevy do not make the radio...they just put their badge onto radios made by at least 6 of the major manufacturers (such as Blaupunkt , Eurovox , Fujitsu etc)

If you can quote the make+model then the exact instructions can be given

Posted on May 08, 2010

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1 Answer

How do I fix the clock display on my 1999 Pontiac Sunfire?


It appears to be that the radio clock display has malfunctioned, and is due for a replacement radio, which could be an aftermarket or oem radio, maybe found at a junk yard.

Tools required for oem replacement radio, torx keys set.

Before working on the radio or other electronics, disconnect the battery cables with 8mm wrench.

Replacing the oem radio is much easier, if you obtain oem radio, compared to aftermarket radio, due to being direct fit.

The radio is same for 1995 to 1999 Pontiac Sunfire and the Chevy Cavalier, regardless of sub models, such as SE,GT, VL,VLX,Z24. etc.

Parts needed for the the aftermarket radio install :Stereo assembly, stereo wiring harness adapter, radio antenna adapter, and dash install kit.wiring diagram for the wire colors / functions, along with tools, such as torx key set, screwdrivers,wire crimper, wire stripper, double ended wiring connectors, hair dryer.

The oem stereo removal video is for the 2000 to 2005 Sunfire / Cavalier, but are the same or very similar procedures.

Link to oem stereo removal procedures.
Pontiac Sunfire Radio Repair and Removal 2000 2005



Link to aftermarket stereo install / connect procedures. ( Sunfire Video )
HOW TO INSTALL AFTERMARKET STEREO PONTIAC SUNFIRE

Link to aftermarket stereo install / connect procedures. ( General Video )
How To Install Car Stereo Single Double DIN Car Audio 101


Have a nice day.


May 12, 2015 | 1999 Pontiac Sunfire

1 Answer

Did you mean: i have a 1999 chevy cavalier with theftlock system i detached the battery before i knew i needed to turn off the theftlock. now my theft light is on solid not flashing can someone please


Turn the key to on, but don't attempt to start. Wait 10 minutes with key in this position, and light should go out. Turn key to off position. Try to start.

Aug 30, 2014 | 1999 Chevrolet Cavalier

1 Answer

Where are the motor/transmission mount location 1999 chevy cavalier 2.2L


There is one under the air cleaner assembly, one on the passenger side inner fender, one on the rear crossmember above the rack and pinion assembly, and one on or near the center crossmember near the radiator

Jul 26, 2014 | Metra 99-4544 1982-1999 Chevy Cavalier...

1 Answer

My factory cd player in my 2001 chevy cavalier wont read cd's so i put a factory cd player from another chevy cavalier and now the screen says locked


Most radios and cd players in cars require a code to get them operating again after they have been disconnected from the battery for an extended time. Hopefully a dealer could help you locate the code for that model.

Dec 16, 2012 | Cars & Trucks

1 Answer

How to unlock my stereo


if you get to step 4 email the code to me at jtisdale23@comcast.net


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1999 Chevrolet Chevy K Pickup - 4WD ' Escalade, Pickup Classic, Suburban, Tahoe, Yukon VIN C/K Service Manual ' Document ID: 522597 Radio Displays LOC, LOCKED, or CODE Step
Action
Value(s)
Yes
No
1
  1. Turn the ignition off.
  2. Disconnect the negative battery cable for 1 minute.
  3. Reconnect the battery cable.
  4. Turn the ignition to run.
  5. Turn the radio on.
Does radio now operate?
--
--
Go to Step 2
2
Important: It will say Theftlock® on the face of the radio.
Does the Radio have Theftlock?
--
Go to Step 3
--
3
Is it possible to get the security code from the customer?
--
Go to Radio/Audio System Operation
Go to Step 4
4
  1. Turn the ignition on.
  2. Turn the radio off.
  3. Depress and hold Pre-set buttons 2 and 3.
  4. Write down the first three digits that appear on the radio display.
  5. Depress AM/FM, write down the second three digits that appear on the radio display.
Did you receive the 6 digit Radio Display Code?
--
Go to Step 5
Send Radio in for repair
5
Contact Delco Assistance to obtain a "Radio Back-up Code".
--
Go to Step 6
--
6
  1. Use the hours and minutes buttons on the radio and install the 4 digit "Radio Back-up Code".
  2. Depress the AM/FM button.
  3. "SEC" should display.
Did the radio unlock?
--
Go to Step 7
Repeat Step 6
7
Important: This will remove the original owner's code. The owner will then be able to reinstall their own personal security code.
Step 6 only unlocked the radio, if the original code is not known, repeat step 6.
Did the radio display?
--
--
Repeat Step 7

Jul 29, 2011 | 1999 Chevrolet K1500

2 Answers

Whats the stereo code in my chevy silverado 1999


Easy go to ebay and look for AC Delco GM Radio Unlock Code TheftLock Chevy just pay $ 5.00 for the action and this guy send your code in about 2hrs. jut follow the instructions good luck!!!

Apr 27, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

Disarming therftlock radio on 2003 Chevy Impala.


I think you may have read it incorrectly...you do not disarm it, you need to know the code, so when you are finished, you can turn it back on.
If you don't have the code the dealer can give it to you.

Jun 27, 2009 | 2003 Chevrolet Impala

1 Answer

I need help to unlock a radio in a 1997 Chevy Cavalier??


InOp means inoperable. There is a 4 digit code that you have to put in on the radio. I don't know if they are all the same code or not, but mine is 0642. read the directions in your car book. If you don't have one let me know and I can scrape mine up. Basically, though any time your battery is diconnected you will have to unlock the radio.

Nov 20, 2008 | 1997 Chevrolet Cavalier

2 Answers

Delco Car Radio


When battery power is removed and later applied to a
secured radio, the radio won’t turn on and LOC will
appear on the display.

Unlocking the Theft-Deterrent Feature After a
Power Loss
Enter your secret code as follows; pause no more than
15 seconds between steps:
1. Turn the ignition on. LOC will appear on the display.
2. Press MN and 000 will appear on the display.
3. Press MN again to make the last two digits agree
with your code.
4. Press HR to make the first one or two digits agree
with your code.
5. Press AM-FM after you have confirmed that the
code matches the secret code you have written down.
The display will show SEC, indicating the radio is
now operable and secure.
If you enter the wrong code eight times, INOP will
appear on the display. You will have to wait an hour with
the ignition on before you can try again. When you try
again, you will only have three chances to enter the
correct code before INOP appears.
If you lose or forget your code, contact your dealer.
Disabling the Theft-Deterrent Feature
Enter your secret code as follows; pause no more than
15 seconds between steps:
1. Turn the ignition to ACCESSORY or RUN.
2. Turn the radio off.
3. Press the 1 and 4 buttons together. Hold them down
until SEC shows on the display.
4. Press MN and 000 will appear on the display.
5. Press MN again to make the last two digits agree
with your code.
6. Press HR to make the first one or two digits agree
with your code.
7. Press AM-FM after you have confirmed that the
code matches the secret code you have written down.
The display will show ---, indicating that the radio
is no longer secured.
If the code entered is incorrect, SEC will appear on the
display. The radio will remain secured until the correct
code is entered.
Theft-Deterrent Feature (If Equipped)
THEFTLOCK is designed to discourage theft of your
radio. It works by using a secret code to disable all radio
functions whenever battery power is removed.
The THEFTLOCK feature for the radio may be used or
ignored. If ignored, the system plays normally and the
radio is not protected by the feature. If THEFTLOCK is
activated, your radio will not operate if stolen.
When THEFTLOCK is activated, the radio will display
LOC to indicate a locked condition anytime battery
power has been interrupted. If your battery loses power
for any reason, you must unlock the radio with the secret
code before it will operate.
Activating the Theft-Deterrent Feature
The instructions which follow explain how to enter
your secret code to activate the THEFTLOCK system.
It is recommended that you read through all nine steps
before starting the procedure.
If you allow more than 15 seconds to elapse between
any steps, the radio automatically reverts to time and
you must start the procedure over at Step 4.
1. Write down any three or four-digit number from
000 to 1999 and keep it in a safe place separate
from the vehicle.
2. Turn the ignition to ACCESSORY or RUN.
3. Turn the radio off.
4. Press the 1 and 4 buttons together. Hold them down
until --- shows on the display. Next you will use the
secret code number which you have written down.
5. Press MN and 000 will appear on the display.
6. Press MN again to make the last two digits agree
with your code.
7. Press HR to make the first one or two digits agree
with your code.
8. Press AM-FM after you have confirmed that the
code matches the secret code you have written down.
The display will show REP to let you know that you
need to repeat Steps 5 through 7 to confirm your
secret code.
9. Press AM-FM and this time the display will show
SEC to let you know that your radio is secure.
The LED indicator by the volume control will begin
flashing when the ignition is turned off.

Jun 01, 2008 | Car Audio & Video

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