PIC4696A

Bulletin No.: PIC4696A
Date: Oct-2015
Subject:
Procedures to Unlock Family Radio with Theftlock
Models:
1994 - 2002 GM vehicles that have a Delco TheftLock radio
This PI was superseded to update Model Years and Recommendation/Instructions. Please discard PIC4696.
Condition/Concern
This procedure will correct all radio theftlock concerns for the vehicles listed. Please read the following carefully! There are time limits associated with some of
these steps. Therefore, if the directions are not followed properly, unnecessary wait time will occur. The mode the radio theft deterrent system is in will
determine which steps to be followed.
Recommendation/Instructions
The TheftLock logo will appear on the face plate of the radio to indicate this radio has the protection of TheftLock. The Pontiac, Buick, Chevrolet and light trucks
will have an indicator light that blinks when the vehicle is off and this feature is activated. Oldsmobile radios do not have the light indicator. The feature is
activated by the customer programming a code into the radio. Instructions are in the customer's owner’s manual. The procedures in this section explains how to
operate the theft lock security system. This includes unlocking the radio, removing and entering customer's code, obtaining the radio display code, and
changing the customer's code.
The theftlock theft deterrent feature in some models includes an LED indicator light that will blink when the ignition is off and the unit is in the secured state.
Radio display definition:
LOC: Means the radio is locked and there is a customer code stored in the radio.
InOP: Means too many wrong codes have been entered and the radio must be left powered up to 1 hour with battery and ignition applied before 3 more attempts
can be made
SEC: Means there is a customer code stored, but the radio is unlocked
---: Means there is no customer code stored and the radio is unlocked
REP: Means the customer code has been entered once, and the radio now wants the code repeated to verify the code was entered correctly the first time.
Index of procedures:
A. Retrieving scrambled back-up code from unit
B. Retrieving back-up code from computer (authorized dealers only)
C. Unlocking/Deactivating unit with back-up code or customer code
D. Removing customer code
E. Adding customer code
F. Changing customer code
G. InOP second level condition
A. Retrieving scrambled back-up code from unit - with battery and ignition voltages applied and unit power is on.
1.
1. If the unit is in the locked condition (LOC is displayed), proceed to step 2. Otherwise, press and hold presets 1 and 4 for about 4 seconds. The
display will show either SEC or ---.
2.
2. Press and hold presets 2 and 3 for about 6 seconds until the first 3 digits of the display code are displayed. Write the numbers down.
3.
3. Press the AM_FM button and the second 3 digits of scrambled code are displayed. Write the numbers down. The unit will revert to the initial display,
prior to code retrieval sequence, after approximately 5 seconds or if another button is pressed.
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Note: Note: If after depressing the AM-FM button the display does not change, your second set of 3 digits will be the same as the first 3 digits.
(Example; if 123 came up first, your scrambled code will be 123123.)
B. Retrieving back-up code from computer (GM and ACDelco dealers) - scrambled code and authorized lock account
number must first be obtained.
1.
1. GM dealerships- your authorized lock account number is made up by the corresponding digit for your controlling car division preceding your 5-digit
GM- dealer code. For example, if your GM-dealer code is 01234, and your controlling car division is Chevrolet, then your authorized lock account
number would be 101234.
1- Chevrolet/Geo 5- GMC
2- Pontiac 6-Cadillac
3-Oldsmobile7- Canada
4-Buick8 -Saturn 1991-1999 with Delco radios
AC-DELCO Shops- Your authorized lock account number is made up by a 9 & 0 followed by your 6 digit AC-Delco account number. For example, if your
AC-Delco account number were 123456, then your authorized lock account number would be 901123456.
2.
Dial 800-537-5140 and listen to the phone prompts. Enter your authorized lock account number followed by an asterisk (*). The next prompt will be your
scrambled code that was obtained from step A, followed by an asterisk (*). The computer will respond back with 4 or 6 digit back- up code.
C. Unlocking/ deactivating unit with back-up code or customer code - with battery and ignition voltages applied and radio
power off.
1.
Press the HR button until the LOC disappears and OOO appears on the display.
Note: If the display does not change from LOC to 000 the unit is probably in the InOP stage, see Step G.
2.
Set the first two digits (01-19) of the code with HR (hours) button.
3.
Note: As if you're setting the time of day you will not see the 0 in the far left side. Example; if the first two digits of your code is 02 you will scroll with the
HR button until 2 appears on the display.)
4.
Set the next two digits (00-99) of the code with the MIN (minute) button.
5.
Press the AM-FM button to enter the code. The radio will now be unlocked and the display will change to the clock. Continue with the following steps to
deactivate the theft deterrent.
6.
Press the HR button until display changes 000.
7.
Repeat steps 2-4 above to remove previous code and deactivation the theft deterrent system.
Note: If the backup code received from the computer does not unlock the radio, one possibility is that the first 3 digits of the scrambled code from the
radio (Step A) are reversed with second 3 digits. Example; if the scrambled code is 123 456, then it may actually be 456 123. Use Step B retrieve a new
backup code.
D. Removing customer code - with battery and ignition voltages applied and radio off
1.
Depress presets 1 and 4 for about 6 seconds until the display changes to "SEC". If the display changes to --- there is no code stored.
2.
Press the HR button until display changes to 000
3.
Set the first two digits (01-19) of the code with HR button.
Note: As if you're setting the time of day you will not see the 0 in the far left side. Example; if the first two digits of your code is 02 you will scroll with the
HR button until 2 appears on the display.)
4.
Set the next two digits (00-99) of the code with the MIN (minute) button.
5.
Press the AM-FM button to enter the code. The theft deterrent system will now be deactivated and customer code removed. The display will show --and then change the clock.
E. Adding a Customer Code - with battery and ignition voltages applied and radio power off.
1.
Press and hold presets 1 and 4 for about 6 seconds until the display changes to ---
2.
Press the HR button until the display changes to 000
3.
Set the first two digits (01-19) of the code with the HR button.
4.
Set the next two digits (00-99) of the code with the MIN button
5.
Press the AM-FM button to enter the code
6.
When "REP" then 000 is displayed, repeat steps 3 through 5 before display changes back to clock. This confirms the customer code and activates the
theft deterrent system. The display will then show SEC for secured.
F. Changing customer mode
1.
When changing a code in a unit that has already had one programmed, the original will have to be removed first. If the radio is unlocked follow step D to
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remove and deactivate the first code.
2.
Follow step E to reenter a new code.
Note: If the unit is in LOC the appropriate steps must first be followed
G. INOP second level lock condition
After eight initial failed unlock attempts, the unit will be in a second level lock condition and become inoperative for over 1 hour. Any further code inputs during
this hour (or depressing any buttons) will cause the display or indicate InOP for about 15 seconds before returning to LOC.
The unit will still be inoperative. To reset to the normal locked (LOC) condition, battery and ignition voltages must be continuously present for over 1 hour
continuously. Do not attempt any radio entries or functions during this time-out period.
After the unit is brought back to the normal locked condition, the correct unlocking procedures can be followed. Following every three unsuccessful entries the
unit will return to the inoperative state (InOP) for another 1-hour period.
Obtaining factory backup code
1.
First, the radio display code must be obtained.
2.
After obtaining the display code, and having your authorized account number, call 1-800-537-5140, 1-800-428-0501 or 1-765-451-1663 with a
touchtone telephone.
3.
A. Gm-dealerships -- when the computer prompts, enter the corresponding digit for your controlling car division preceeding your 5 digit gm-dealer code,
then press *.
1 - Chevrolet/Geo
2 - Pontiac
3 - Oldsmobile
4 - Buick
5 - GMC
6 - Cadillac
For example, if your gm-dealer code is 01234, and your controlling car division is Chevrolet, then 101234* would be entered.
B. Ac-Delco shops -- when the computer prompts, enter the Ac-Delco account number in the following manner: press 9 0, then your 6-digit account
number followed by an *. For example: if the account number is 123456, then 9123456* would be entered.
Note: if your Ac-Delco account number is 8 digits, first Press 9 then the first 7 digits of the account number, followed by an *.
4.
When prompted for a 4 or 6 digit code, enter the display code, then press *. The computer will respond with the factory backup code. Write it down.
Reference "to unlock radio" and "to remove customer's code" to use the factory backup code.
5.
Another display code may be entered when the computer prompts. If you are done, simply hang up.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may
occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools,
safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that
your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
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