I have been doing a lot of reading and was wondering if there was a way to use the tow/haul mode on the 98-00 Vortec motors? On this motor, it is called "Economy" instead of Performance. I have heard the the only way to use it is a Class 2 data signal to the PCM....so is there a way to somehow send this signal to enable the economy mode? This would be pretty cool if it were possible.