2005 Chevy Trailblazer Electrical Issue... - Chevelle Tech
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post #1 of 5 (permalink) Old Jan 2nd, 19, 2:56 PM Thread Starter
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2005 Chevy Trailblazer Electrical Issue...

My friend has a 2005 Chevy Trailblazer. Recently, it started have a weird electrical issue. They will be driving along and it will lose power for 1 to 2 seconds - the AC will turn off, lights will dim, and the radio will turn off. The battery connections are tight. Where should we start looking to track this gremlin down?? If anyone has any ideas, your input will be greatly appreciated. Thanks in advance.

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post #2 of 5 (permalink) Old Jan 2nd, 19, 3:26 PM
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gary
 
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Re: 2005 Chevy Trailblazer Electrical Issue...

Possible ignition switch. Chevrolet Trailblazer Ignition Switch Problems - part 1
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post #3 of 5 (permalink) Old Jan 2nd, 19, 7:42 PM
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Re: 2005 Chevy Trailblazer Electrical Issue...

I'd also look at the BCM. Make sure the connections to it are good, tight and clean. It could also be that the BCM itself is starting to fail.

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post #4 of 5 (permalink) Old Jan 19th, 19, 10:59 AM Thread Starter
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Re: 2005 Chevy Trailblazer Electrical Issue...

We changed the ignition switch and installed new O2 sensors (the dang parts stores all told him that it had four O2 sensors, when it only has two - inline 6 engine). The engine is running better now (he says it is a lot smoother) and the vehicle has not lost power since the ignition switch was changed. So, we are going to call it a victory for now. Thanks for the input.
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post #5 of 5 (permalink) Old Feb 10th, 19, 1:54 PM
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Re: 2005 Chevy Trailblazer Electrical Issue...

Those switches are usually the culprit 90% of the time. Shared with the SSR (it's a trailblazer chassis and drivetrain) and most of us carry a spare around at all times because of it.

However, the '05 SSR also experienced an issue that would only happen after heat soak under the hood - a wire within the fuse box fatigue cracks over time and the heat finally causes a full separation. After sitting long enough to cool down, it'll restart and run again. From the description, this doesn't sound like the problem though - which is good. It's an expensive repair.

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