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General Motors radio unlock code

General Motors calls this feature "TheftLock." Covers Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile, Hummer and more.

⚠ No longer available — we can no longer retrieve unlock codes for these radios. This page is kept for reference only.
$12.99 Standard · 30 min – 24 hr $24.99 Express · within 1 hr
Serving the automotive industry since 1998

1 Find your radio serial number

General Motors uses a security feature called "TheftLock." Follow these steps to read the serial number your radio needs.

Read the serial number

  • Turn the ignition ON — the radio displays LOC.
  • Press and hold preset buttons 2 & 3 (or 1 & 4) for about 10 seconds.
  • The display changes from LOC to a three-digit number. Write it down.
  • Press the AM/FM button — a second three-digit number appears. Write it to the right of the first.
  • You now have a six-digit serial number (some GM & Geo radios show all four digits at once).
RDS radios (2003 and newer) are not supported.
If you enter the wrong code eight times the radio goes to INOP — leave the ignition on for an hour to return to LOC. Need help? Contact us.

2 Place your order

Enter your details in the order form, choose Standard or Express, and pay securely with PayPal. We email your General Motors unlock code — standard service in 30 minutes to 24 hours, Express guaranteed within 1 hour during business hours.

About General Motors radio unlock codes

Many General Motors vehicles are fitted with a factory radio that uses an anti-theft security code. This General Motors radio code is only needed if the stereo loses power — a dead or replaced battery, a disconnected battery, or a radio that was removed from the dash. When that happens the radio locks and will not play until the correct unlock code is entered.

General Motors radios use the "TheftLock" anti-theft system. We retrieve your unlock code from the radio's serial number, which you read directly from the unit — no dealer visit required.

Radio-Code.com has provided factory car stereo unlock codes since 1998. Standard service delivers your General Motors code in 30 minutes to 24 hours, 7 days a week, and Express service is guaranteed within one hour during business hours. Every order is backed by our money-back guarantee. Already have your code and need help entering it? See our General Motors input manual.