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.
1972 El Camino Custom
2005 SSR 6-speed