I really like my Chevy Avalanche but was never satisfied with the power delivered from the 5.3L powerplant. It's a pretty big truck (Suburban is disguise) and didn't move too quickly or go over hills very happily under the power of the 5.3. I thought about buying something new, maybe a Ford Ecoboost but I decided to go a different direction and supercharge the Chevy. I took the boat out for a tow over a few hills yesterday and I am very happy with the results. It's drives as it should have from the factory now. The delta guys out there know all about towing over the Vasco Road hills and the Altimont pass. Going over the Altimont it only shifted down once at the bottom when I needed to accelerate to pass a big rig. Once up to speed it held 3rd gear at 65mph all the way to the top at about 2/3 pedal into it. What's even more impressive is how little has changed. It's silent as long as your foot is in the throttle less than 1/2 pedal, idles smooth, retains good gas mileage, and even looks pretty stock under the hood. It is a bit of an investment but it sure beats buying a new truck. The shop needs a new GM dongle so they can turn off the 100mph governor but once that's gone we expect it to dyno at 384hp (rear wheel or about 460hp at the crank). The dyno tuner expects to maybe get another 15 with a few tweaks to the tuning. No more dreading the big hills!
This would also be a great upgrade to a truck with a 4.8L motor.