GM already offers this flexibility with its dual-mode active exhaust system (RPO code NPP), which is available for certain trims of the Chevy Silverado and GMC Sierra 1500. However, the feature is ...
Luckily, GM offers a dual-mode active exhaust system capable of offering the best of both worlds, depending on the situation at hand. Now, we’re getting an earful of the dual-mode active exhaust ...
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