ok, so the displacement on demand feature of the new tahoe is suppose to improve gas milage but i've yet to witness any real effect.
situation 1: cruising at 75mph down I-20 the engine only drops to V4 when there is no load on the motor (going down a slight grade). the way it was originally explained to me was that if you were cruising at a constant speed the motor would drop to V4 and stay that way until a significant demand was placed on the engine. question: was this explained wrong or do i have a bad computer?
situation 2: one would think that at idle or in stop and go traffic