Increased minimum engine speed after upshift during DPF regeneration for better regen efficiency (this feature will only appear with the GDE Hot Tune installed in ECM).1-2 gears lower compared to normal shift maps) Revamped warm-up mode scheduling to provide faster engine warmup (i.e.Refinement on shift scheduling in altitude to provide better engine responsiveness.Hill mode optimization to prevent gear hunting.Downshift criteria revamped to best utilize engine torque curve and stay in each gear longer. Upshifts earlier in all conditions for improved fuel economy.Eliminates 2-1 downshift hesitation at low speed tip-in maneuvers (i.e.
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