Hey, I'm pretty new here, but had a few questions about the Nelsons tune. Well let me start off by saying that I am a regular at the truckmoxie site and they pretty much live by the Westers tune, but I have decided that Nelson's is the one for me. I am not quite ready for the tune, but I need to go ahead and do it. I recently installed my 3.90 gears and my handheld programmer does not have a setting for them. So my speedo is off a little which bothers me. So a Nelson is in order. My question is though that the 180 degree stat for the 2004's is not out yet but will be in another month or so and I still have the underdrive pulley and electric fans that I want to do. I cannot wait for the tune, so these will come later. Nelson will send an updated tune for these mods I know, but, will driving the truck with the new mods but the old tune hurt anything, other than performance?
2007 Silverado NNBS RCSB__4.8 Liter
True-Flow Drop-In/Stock Air Box(modded)/AirAid MIT, 3" SLP LM1, Shaner Ported 90MM TB, Wheatley Tuned
1999 LS1 Z28__Stone Stock for Now