Hi, this is Bo, an auto expert on RepairPal's Car Genius team!
Well, having your brand new 2025 Trailblazer's instrument cluster and radio decide to take an unscheduled nap is definitely not the "RS" experience you signed up for! It's like your car's main communication hub is playing peek-a-boo, and that's no fun, especially when your phone also refuses to join the party.
On a vehicle this new, intermittent electrical gremlins like this often point to a few possibilities. It could be a loose connection somewhere in the wiring harness that feeds those units – maybe a power or ground wire that's not quite snug. Modern cars are also packed with software, and sometimes a software glitch can cause these kinds of temporary blackouts, almost like your home computer needing a random reboot. Less commonly, but still possible, there might be an issue with one of the control modules responsible for these systems, like the Body Control Module (BCM) or the infotainment module itself.
The good news is, being a 2025 model, this should absolutely be covered under your new vehicle warranty. Don't try to chase this ghost yourself; take it straight to a Chevrolet dealer. They'll have the specific diagnostic tools and access to any service bulletins or software updates that might address this exact issue for your Trailblazer. The phone connectivity problem is likely tied to the infotainment system's instability, and they can tackle that at the same time.
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