Question about 2000 GMC Sierra

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2000 gmc sierra factory stereo

I changed my used sierra's battery and when I got power, my factory stereo locked up. The original owner can't remember the security code. Is there anyway to reset it without taking it to a GM mechanic?

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  • Anonymous Mar 16, 2014

    Wont start. Code P1351 comes up when plugged into computer

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  • 298 Answers

Look behind the glove box, there should be a sticker with the code on it. or in the owners manual if you have one.

Posted on Aug 17, 2008

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www.DelcoLockCode.com will get you your unlock code for you. It's only $5 so it's better than going to the dealership.

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Car stereo got locked when replaced battery. unable to use stereo, it asks for a code


go to dealer original dealer is best take owner ship they will require for verifacation of ownership they can supply codes to un lock
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Jan 16, 2010 | 2002 Suzuki XL-7

1 Answer

Stereo not working


Your stereo may have a security code that needs to be entered whenever the radio is disconnecred from the battery. It's an anti-theft device that makes the radio worthless to theives (even though nobody would steal a factory radio but, I digress...).

Have a look through all of the documentation for your van, owners manual, any additional pamphelts, etc. There may be one for the radio that should contain the reset code.

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Factory radio wiring color codes


Here ya go. enjoy!
2002 GMC Sierra C1500 Car Radio Wire Color Codes
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black/White
Car Radio Illumination Wire: Brown
Car Stereo Dimmer Wire: Gray
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: Under the center console.
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

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1 Answer

Unlock the radio


radio is locked were can i get code is it on truck somewhere

Feb 27, 2009 | 2000 GMC New Sierra 1500

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