08-09-2005, 12:32 PM
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#1
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Registered User
Join Date: Dec 2003
Location: SOCAL
Age: 24
Posts: 352
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Radio Locked
OK I took the 6 disc out of my Sierra and put it in my dads Trailblazer. I did it with the power on in the TB and the radio worked fine until i cranked the engine and it locked
I went to the dealer and he hooked the tech-2 up to it and said he couldnt unlock it. He said there is a problem with switching from the truck to the TB
Does anyone have any advice on how to unlock it? Otherwise I guess I will have a 6 disc for sale
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04 SIlver Sierra everything except leather
Line X, Trenz Billet Grill, Escalade Handles
FINALLY DONE-- but now its all stock again
12" Bulletproof kit
1.5" Coil Spacer
4" CST Spindle
9"atlas Springs 4" block
Mountain Crushers on 37 PJs
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08-09-2005, 01:03 PM
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#2
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SPL NUT!!!
Join Date: Jul 2002
Location: Stockton, Ca
Age: 37
Posts: 1,832
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Re: Radio Locked
The following procedure will give you a new code that you can use instead of your personal code. Using this new code, you can “unlock” your radio and then “re-lock” it with a new code if you wish. Prerequisites: The radio must be in LOC mode NOT in INOP mode. Let me explain. If you have activated the Theft-Deterrent feature of your radio and loose power, the radio goes into LOC (theftlock) mode. With the ignition on, you must use the MN and HR buttons to enter you personal code in order to unlock it (The instructions are on page 3-27 in your Y2K Owner’s manual). If you fail to enter the correct code eight (8) times, the radio goes into INOP mode. You have to wait an hour with the ignition on before the radio returns to LOC mode (go for a long drive somewhere).
Procedure:
01. Turn the ignition ON (The radio displays LOC)
02. Hold down the Radio Presets 2 and 3 buttons for six seconds
03. The radio display changes from LOC to a three-digit number. Write this number down. Don’t take forever, fifteen seconds max before the next step.
04. Press the AM/FM button
05. The radio display changes to another three-digit number. Write this number to the right of the first one.
06. You now have a six-digit number, the first three digits are from STEP 03 and the last three digits are form STEP 05
07. Call 1 800 537 5140
08. Press 1 then # (pound). You’ll hear “Invalid Code, try again”
09. Press 139010 then # (pound). You will be asked to enter your four or six digit code followed by * (start)
10. Enter the number from STEP 6 then * (star)
11. Listen to the four-digit number and write it down. It will be repeated twice
12. Turn the ignition ON (The radio displays LOC)
13. Use the MN and HR buttons to enter the code from STEP 11
14. Press the AM/FM button. The radio display changes to SEC Your radio is now “un-locked” and usable. The Theft-Deterrent feature is STILL active! If you want to disable it, use the instruction in your Owner’s manual. Use the code from STEP 11 instead of your personal code.
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08-09-2005, 01:51 PM
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#3
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Registered User
Join Date: Jun 2005
Location: Valliant, Okla
Age: 22
Posts: 58
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Re: Radio Locked
D@MN this guy has to of had to do it atleast once b 4......
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05 RCSB Chevy Silvy 4.3 Debaged
Eagle 219z Hankook 275/60R17z
2 Infinity Reference 12"z mounted in a Pro Box....and a Db Speed series 1200.1 Amp..... 
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08-09-2005, 02:43 PM
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#4
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:-)
Join Date: Jun 2001
Location: Austin, Texas
Age: 33
Posts: 7,122
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Re: Radio Locked
exactly as he said above.. 
__________________
GARAGE:
03 Yukon
02 Tahoe
00 Impala
94 Z71
55 Chevy Stepside
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08-09-2005, 02:46 PM
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#5
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www.HotRodSearch.com
Join Date: Sep 2001
Location: Detroit
Age: 43
Posts: 26,832
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Re: Radio Locked
Great info, this is now a sticky 
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08-09-2005, 03:03 PM
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#6
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hippies hate deathmetal!
Join Date: Jul 2005
Location: Redding, Ca
Age: 25
Posts: 1,587
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Re: Radio Locked
Damn!
Now that is some research!
Good job "idbl Fanatic"
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08-13-2005, 09:22 AM
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#7
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Registered User
Join Date: Sep 2004
Location: san diego
Age: 39
Posts: 40
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Re: Radio Locked
will this work with all new gm radios? you dont need to SPS program the system? thnx
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08-13-2005, 02:43 PM
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#8
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Registered User
Join Date: Aug 2003
Location: Oklahoma
Age: 23
Posts: 113
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Re: Radio Locked
wow now i can go steal me some stock radios! no wait. why would anyone want a stock radio?
__________________
98 Silverado Z71 ECSB, Flowmaster, AIRAID, BFG 285s, and toolbox.
Infinity Perfect 6.1s inside.
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08-14-2005, 11:09 PM
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#9
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03arrival
Join Date: Jul 2003
Location: texas
Age: 23
Posts: 69
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Re: Radio Locked
Is there a way to unlock the navigation radio?
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03 arrival blue silverado with a billet bowtie, flomaster 40 series dumps, a 3 in P.A. body lift, sticky mickey mud grappler radial and mickey thompsom classic lock 2's, and everything is painted to match.Just added in dash 6 disc.
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10-25-2005, 05:51 AM
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#10
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Registered User
Join Date: Sep 2005
Location: New Hampshire
Age: 60
Posts: 26
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Re: Radio Locked
Does this work for all GM radios, my 1997 is locked and driving me crazy without tunes. thanks
Last edited by bikernut; 10-25-2005 at 05:51 AM.
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12-17-2005, 03:36 PM
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#11
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Registered User
Join Date: Sep 2005
Location: Hammond, IN
Age: 22
Posts: 134
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Re: Radio Locked
Quote:
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Originally Posted by 98chevyZ71
wow now i can go steal me some stock radios! no wait. why would anyone want a stock radio?
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I'm right next to Gary Indiana so stolen stock radios are pretty common.
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*EDITED BY ADMIN*
Please read signature rules before setting new signature.
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12-17-2005, 06:20 PM
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#12
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Supporting Member
Join Date: Mar 2004
Location: Lompoc, CA
Age: 65
Posts: 2,422
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Re: Radio Locked
Quote:
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Originally Posted by Blaze5509
Damn!
Now that is some research!
Good job "idbl Fanatic"
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Probably just a lucky guess.
__________________
'04 Silverado 1/2 ton 2WD ext. cab dk. grey. 5.3 liter, locking diff. XLerator exhaust - offbrand but throaty. Borgeson intermediate shaft, Bilstein HD shocks.
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03-17-2006, 06:52 PM
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#13
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Registered User
Join Date: Dec 2005
Location: Texas
Posts: 88
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Re: Radio Locked
This does not work on 2003+ The display is "LOCKED" not LOC. Unfortunately, our local dealer couldn't unlock a radio I got on Ebay.
****Update****
Another dealer was able to unlock using their computer scanner. They simply deleted the old VIN from the radio and added mine. Apparently our local dealer was trying to unlock it the old way by holding the 2 and 3 buttons down. The cost was about $50 bucks when it was going to be free for doing it the old way. Anyway, my radio from Ebay works fine now.
Last edited by aldaran; 03-19-2006 at 10:30 PM.
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04-04-2006, 04:32 PM
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#14
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Registered User
Join Date: Apr 2006
Location: Michigan
Posts: 5
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Re: Radio Locked
Man am i glad i found these forums
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05-15-2006, 11:22 PM
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#15
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Registered User
Join Date: May 2006
Location: Hope, British Columbia
Posts: 1
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Re: Radio Locked
THANK YOU "Fanatic" for your GM unlock post.
IT WORKS GREAT. 
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06-06-2006, 02:44 PM
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#16
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Registered User
Join Date: May 2006
Location: east
Posts: 4
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Re: Radio Locked
if there is a mode button hold that down and press the power button on the 6 disc that should unlock it
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06-24-2006, 09:12 AM
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#17
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Registered User
Join Date: Jun 2006
Location: raleigh, nc
Posts: 1
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Re: Radio Locked
I'm trying to switch out a factory radio I got from a salvaged vehicle in my 2002 Trailblazer. The display says "locked" rather than "loc" and I tried holding down the 2 and 3 presets and got no response. Will I have to take it to the dealer? If so, how much will it cost?
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07-15-2006, 07:17 PM
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#18
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Registered User
Join Date: Jun 2006
Location: Texas
Posts: 50
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Re: Radio Locked
I hate Theftlock.
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07-17-2006, 01:12 PM
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#19
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Registered User
Join Date: Jan 2006
Location: South Florida
Posts: 5
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Re: Radio Locked
Quote:
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Originally Posted by rpdtony
I'm trying to switch out a factory radio I got from a salvaged vehicle in my 2002 Trailblazer. The display says "locked" rather than "loc" and I tried holding down the 2 and 3 presets and got no response. Will I have to take it to the dealer? If so, how much will it cost?
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I have an 02 TB and I'm looking into swapping my OE for another OE. Just trying to get all the info I need beforehand.
Last edited by Partsguy198; 07-17-2006 at 01:14 PM.
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08-04-2006, 10:02 PM
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#20
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Registered User
Join Date: Aug 2006
Location: Il.
Posts: 21
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Re: Radio Locked
Will this procedure work on an 01 Silverado. I bought the truck with 4000mi. on it and I don't know if anyone ever put a code into it. Eventually I'm going to need a new battery and I would like to get the radio working.
Willy Victor
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