From the
Winding Road:
In addition to the hybrid system, GM added LRR tires plus a few aero mods - things that could be on non-hybrid models too...
Quote:
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Additional details specific to the Sierra Hybrid include aerodynamic aids. A slightly deeper front air dam and a tonneau cover for the bed reduce air drag, fostering maximum efficiency.
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Hmm - a deeper air dam. Remember what Ford did to it's '08 Superduty pickups?
Ecomodder - New: Ford mods their Super Duty pickups ... chin spoiler + final drive changes