Gmc Sierra 2025 Pro 2025 Specs. The motortrend buyer's guide has the 2025 gmc sierra 1500 specs you need, from dimensions and cargo space to power and mpgs. The specs below are for the 2025 gmc sierra 1500 pro 2wd, the sierra 1500 is available in a variety of configurations, the complete details of which can be found on gmc.com.

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