2019 GMC Sierra AT4’s Off-Road Performance Package Actually Adds Power

If you need to get somewhere off the beaten path just that much more quickly than The Other Guy – or maybe you simply want to one-up your neighbor and their new Sierra AT4 – GMC has an answer for you. Despite being only about three seconds old, The General is already throwing a new […]

The post 2019 GMC Sierra AT4’s Off-Road Performance Package Actually Adds Power appeared first on The Truth About Cars.

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Author: Matthew Guy

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