Question about 2003 Chevrolet TrailBlazer
1. Press and hold presets 2 & 3 for about 10 seconds until the first 3 digits of the display code are displayed.
2. Write the numbers down.
3. Press the AM/FM button, write down the next 3 numbers.
4. Call 1-800-537-5140, when asked, enter 620529, press the # button and enter the 6 digit code from the radio, you will get an unlock code, write it down.
5. Go back to the car, press the HR button and set the first 2 numbers, then press minute button and set the next two last numbers, press AM/FM button, SEC should be displayed, turn on radio.
To remove customers code, repeat step 5. you should see --- on radio face, the code is now out of the radio.
EDIT: Updated with new dealer code. FWIW, the old code was 202107
Posted on Dec 30, 2010
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Posted on Jan 02, 2017
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