TrailBlazer 2002-2009
2023- The TrailBlazer, originally introduced as an upscale Blazer, was produced from 2002 to 2008 with a powerful I6 engine and with a monster V8 offered in the Trailblazer SS
Platform: GMT 305, 360, & 370.

2003 Trailblazer starts with no key

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Jan 12, 2018 | 12:42 AM

keyless wonder

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2003 Trailblazer starts with no key

Old column was broken, it started without the key... I installed a new column, new ignition lock cylinder and did the 30 minutes reset. It can still start with no key. Please help!

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