I'm going to disagree with the poor fuel economy and low power for the 4.2 engine. I average 20 MPG in my Trailblazer. I drive with a very heavy foot too. I've gotten even better fuel economy on road trips. As far as power goes, the 02-05 engines had 270 HP and 275 Ft.lbs. The 06-09 engines had 290 HP and 277 Ft.Lbs. The guys that have been turboing the engine are claiming 400-450 Hp at the wheels. Compare those numbers to an old Stovebolt!
I will admit, they can be a little doggy around town, but that has more to do with Torque Management function in the ECM. Not to mention, A Trailblazer weighs close to 5000 lbs! I have no complaints about their abilitly to haul or tow. In fact, my Trailblazer tows better than my truck.
Yes, the LS motors are extremely plentiful and the aftermarket is enormous for them. I come from the school of thought, dare to be different.
