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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.

no power to diagnostic port

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Old January 30th, 2013, 11:54 AM
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Default no power to diagnostic port
I have an 02 chevy trailblazer which is giving the check engine light and reduced engine power signal.
I plugged in my obd2 scanner and nothing. the fuses and connections are good. Any other ideas?
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Old January 30th, 2013, 12:00 PM
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Can you check the scanner from another vehicle?
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Old January 30th, 2013, 1:56 PM
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yeah it works fine on my silverado
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Old January 30th, 2013, 2:41 PM
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you might take some non conductive contact cleaner to the port, clean it.
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Old January 30th, 2013, 2:43 PM
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alright i'll give it a shot thanks
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Old February 15th, 2013, 7:32 PM
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Did that work? I am having the same problem on a 2007 silverado.
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Old April 15th, 2013, 9:47 PM
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check fuses on my 04 trailblazer it is on the #13 cigarette lighter fuse
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Old April 16th, 2013, 6:22 PM
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15 amp fuse for the cigarette lighter in the underhood fuse block.
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