Nice update. We're still enjoying our '02 GMC. Best truck I've ever owned. It just runs. I recently replaced the yellowing/hazing light lenses (headlights, turn signal, HMSL, and brake lights) and the thing looks new!! Those parts were pretty cheap, even from GM, so I figured that I'd do it now, so I have a few more years with the truck. I also installed LED all the way around. The headlights are awesome. I had to replace the flasher, though. The stupid thing is hidden under/in the dash, you have to take the freaking dash apart to replace it!! (IMG:
http://www.frrax.com/rrforum/style_emoticons/default/banghead.gif) Hell, it's easier to replace the cabin air filter.
Following your blockers is a great way to get MPG, although these newer GM trucks get great mileage. A friend recently replaced his '04 Chevy 1500 with a '16, and says the performance and mileage are night-and-day different. I think he's also netting upper-teens towing his BSP Vette to SCCA autocross events all over the country. His son
had an Ecoboost Ford truck, and I think he sold it because loaded, it got worse mileage than a 4X4 extended cab F250. That, and his dad kept rubbing the mpg in. (IMG:
http://www.frrax.com/rrforum/style_emoticons/default/2thumbs.gif)
The Bilstiens are the way to go, no doubt about it. If you're going to keep the truck, get the yellow shocks on it. They were the first thing besides diesel we put on our truck. Heck, they may have been one of the last sales Arlen Strano made.
The throttle response and trans shifting is just a tune away, but GM will screw you then. We had our Tahoe tuned, and if they did nothing more than fix the 'torque management' the tune would have still been worth every dollar.