OK, one more thread and then I am going to quit for the day. Got a '98 'Burb with the 5.7. Occasionally I pull a car hauler or other utility trailer and, although it gets around ok on flat roads, it really loses power on the hills. What would you suggest to increase the power of this thing....I thought about selling it for something more suitable for towing, but I would prefer not to. I also do not want to mess up my mileage...I got 15 mpg on a 400 mile trip pulling a car hauler with a small car on it. Of course, I was really taking it easy...