Just read in 4Wheel&Offroad about GM making a new hybrid 1/2 ton silvy and sierra in 2 and 4 wheel drive. "A 14kW electric induction motor is positioned between the 5.3 and 4l60 and replaces the conventional starter and alternator which shuts off the engine at idle and restarts it when the accelerator is depressed." Gets a couple more mpg. "And a 42 amp battery pack can be stored as well as 20 amps of 120 volt household like power through outlets in the cab or bed." I don't know if it's really worth the extra $1500 for the option? Your thoughts?