Question about Chevrolet Tahoe

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Leave key on not running for 1 hour factory reset in 1 hour enter when code appears 00000 when radio starts working enter 00000 then enter in what ever you like the write it down keep in good place

Posted on Aug 26, 2008

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It usually comes on a cd that has the unlock code on it if you dont have then the dealer might can get it for you

Posted on Aug 26, 2008


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My Chevrolet Tahoe 1999 start then stops ! 2 my

A common issue with the later 90's chevy was an ignition tumbler going bad. So, where you put your key in to start the vehicle--this part needs replaced. One I seen actually stuck in the starting position and burned up the starter before power could be shut off to the vehicle. Lock/Unlock buttons on the door? Try disassembly of switch and cleaning the contacts with electronic parts cleaner, dry and re-assemble. Be sure to use cleaner that is safe for plastics.

Oct 01, 2013 | 1999 Chevrolet Tahoe

1 Answer


There is no actual "security code" in the radio as in past model years. The newer theft deterrent system utilizes the class 2 serial data to determine if the radio is in the appropriate other words it compares the VIN it has stored in it's memory with the VIN of the other modules (body control and PCM) in the vehicle to "check" to see that it's in the correct vehicle.

Each time the radio receives the "run" power mode message, it compares the VIN information it has stored to the VIN information received from a module on the class 2 serial data circuit responsible for transmitting that information. If a mis-match occurs, the radio display will indicate to the user the radio is locked. Once this takes place the radio will not respond to any buttons/commands and becomes inoperative. But the dealer can reestablish the radio into a different vehicle with a scanner.

There are 2 types of GM Theftlock, Theftlock I and Theftlock II. The Theftlock I is found in pre 2000 vehicles, and Theftlock II is in the later models.

Theftlock I - Uses a volatile user settable code that is input through the key pad on the front of the Radio. If the power is lost (dead battery etc.) the code is gone and must be re-entered for the radio to work. But with the correct procedure the owner can unlock it.

Theftlock II - Uses an EPROM (erasable/programmable read only memory) or a PROM (the difference is you can not alter the prom once it is programmed).

In either case the code is burned in and holds even when the power is lost. With Theftlock II the radio is married to the vehicle by way of the VIN. When the vehicle is started the computer compares the number in the radio with the VIN in the body control module. If they match, the radio works, if not the radio displays LOC and you are finished, there is no easy way around it. The radio will not work until you make a trip to the dealer.

The dealer will use a TECH 2 scanner to change the VIN stored in the radio. The radio does not need to be removed (for the serial number or any other nonsense). The technician just plugs into the computer and resets the VIN in the radio.

Thank you for using fixya and good luck. you might get luck by removing the fuse toy our radio for 5 min and reinstalling it, this will reset the radio to default and all you need to do is reset the clock and radio presets.

Jun 15, 2010 | 2004 Chevrolet Tahoe

1 Answer

Gm 2002 tahoe radio locked

Usually, if you go to a "good" GM dealer...they will take care of this problem for you. It requires them calling a 800 number to get the code. Just give them the run around ...."I bought this vehicle used, and my battery died and now my radio is locked...." it usually will work out for you without any cost.


Jan 24, 2010 | 2002 Chevrolet Tahoe

1 Answer

Want to know if i can put a differential from a 2007 tahoe on mi 2003 denali xl mine is lock

Look in the glove box and look at the GM PRO Code sticker. Look for the codes GU1=axle ratio 2.41 GU2=ratio 2.73 ect up to GU6=ratio 3.42 or it may be GV which is the rear axle ratio codes. As long as the codes on the Tahoe matched the Denali your good to go. Good luck and keep me posted, If you'll like me to let you know your rear axle ratio and if it's a locking or not just ask, be glad to help

Jun 09, 2009 | 2003 GMC Yukon Denali

1 Answer

Programming used key fob for a 2000 tahoe

get in your truck close all the doors put your key in the ignition push and hold your unlock button on the door panel turn the key on then off then on then off release the onlock button at this time the lock should cycle lock then unlock by them self if they did push and hold your lock and the unlock buttons on your remote at the same time for 15 seconds the lock should cycle agian and you are programmed

Jun 04, 2009 | 2001 Chevrolet Blazer

2 Answers

Door locks quit working

check battery in the remote

May 10, 2009 | 2006 Chevrolet Tahoe

2 Answers

Alarm problem on 2004 chevy tahoe

you will have to write your vehicles vin number down wich is if you look throught the windshild on the drivers side you will see it its a little plate with numbers but right down the vin number and take you drivers license and Registration with you to the chevy dealer ship and request the remote for that vehicle. and they should be able to get you one. as far as i know the remote is the only way to get the alarm off. I hope this helps you

Mar 21, 2009 | 2004 Chevrolet Tahoe

1 Answer

Lock codes

Your best bet would be to call a dealer. You need to know what stereo is in your car. Call them and give them the serial number off the back of the stereo and they will tell you the codes.

Mar 15, 2009 | 1995 Mazda 626

1 Answer

Saturn sl 98, need code for stero, its on lock

turn key on and hold down buttons 2 and 3 for 5 sec. radio should display a 4 didgit code. call dealer for unlock code. after getting code use seek and scan buttons to enter code then press th am/fm button.

Nov 22, 2008 | 1998 Saturn SL

2 Answers

Radio lock

1. Turn the ignition ON (The radio displays "LOC").
2. Press and hold presets buttons 2 & 3 or 1 & 4 for approximately 10 seconds.
The radio display changes from "LOC" to a three-digit number. Write this number down. If you have a Saturn or GEO, see note below and skip to step 5.
Don’t take long, fifteen seconds max before the next step
3. Press the AM/FM button. The radio display changes to another three-digit number. Write this number to the right of the first one.
4. You now have a six-digit number, the first three digits are from STEP 2 and the last three digits are from STEP 3, so you will have a number like this ( 212 - 212 )


Oct 01, 2008 | 1998 Chevrolet Tahoe

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