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TrailBlazer 2002-2009
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.

OBD connection location

   
Old January 12th, 2011, 6:34 PM
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Default OBD connection location
Can someone tell me where the OBD connection is located on a 2003 trailblazer ext

thank you,
Kevin
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Old January 12th, 2011, 7:09 PM
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never mind I found it, Po171 system to lean
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Old January 12th, 2011, 8:18 PM
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Welcome to the forum, glad you found it.
please take a moment to post where it was located so others may benefit from your efforts
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