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Need advice: Shudder at light throttle around 40 mph

TireDriverCommunity StarterJul 14, 20262023 GMC Sierra 1500 AT4Boston / New England
I get a light shudder at steady throttle around 35–45 mph. If I accelerate harder or lift off, it goes away. Trying to figure out whether this sounds more like torque-converter behavior, engine misfire, or tires. I'd rather test this logically than start replacing parts.
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