Stage 2 AI Performance Chip Module OBD2 for Hummer – Adaptive Power & Fuel EfficiencyLike Nothing Else Now With No Compromises The Hummer is an icon of unstoppable capability. Whether you command the road in the military derived H2 or navigate trails in the agile H3, you drive a vehicle that says you can conquer any terrain. However, the sheer mass of these beasts, combined with factory tuning designed for "civilian comfort," often results in sluggish acceleration and abysmal fuel economy. The heavy duty drivetrain needs more urgency,