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I have the same vehicle...if they stopped working it could be the seat module. What I did was disconnect the battery cables for about a 1/2 hour then reconnected. It worked. The battery had drained a month earlier and seats didn't work after. So I just tried this and it worked (probably had to be reset). Good luck.
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www.trailvoy.com All the answers for your Trailblazer from true enthusiasts!
