Hey guys. I'm new to the forum, but I've been doing some searching around trying to find this answer and haven't had any luck. I have a 2007 Silverado 1500 NNBS w/the 5.3 (non-flex fuel). Currently performance wise all I have is a Flowmaster 40 single in, dual out exhaust, but I have purchased a Volant Powercore CAI for it. My question is: do I need to tune it, or by resetting my ECM (power cycling it upon installation of the CAI) will my factory ECM settings be enough to adjust for the increased flow? I have previously run CAI's on trucks without tuners and haven't noticed any issues, but at that time I didn't know much about running lean or tuning at all for that matter, so I could have been lean and not known it. Right now I have just ordered the Powercore CAI. Is it safe to run just that without a tune? I was also planning on trying out the ram air tube for improved throttle response and mpg's (so they claim) as I do a lot of highway driving. Has anyone run the full set-up with the tube without a tune (or at all for that matter)? Truck has low miles and I want this one to last for me, so I don't want to lean it out and end up with issues down the road. If I need a tune, I will just wait another couple months until I have enough cash to get one and then install the intake at the same time as the tune. Also, has anyone run the Diablosport Trinity T1000 on this truck (any NNBS with the 5.3l)? If so how are the results? I really want a custom tune, but there are a few issues I have with doing that instead of a handheld. One: I don't want to have to worry about sending/receiving ECM's from a place like Blackbear, Westers, etc. If I have to have work done I don't want to deal with that hassle. Two: There are no dyno shops anywhere close to me that I can find, so I can't get a tune done locally. 3. I want a data logger, and something like the T1000 can do that for me. I also want to be able to view/clear codes, which is another reason I am leaning towards something like the Trinity. They just seem much more convenient than an ECM re-flash a tuner would do for me. I understand that performance wise I would most likely be much better off with a custom tune, but does it practically make any sense to go that route when you can get a data logger, tuner, and code reader that is readily available to you all the time for much less? Thanks for all your help. This site looks great and I hope I can contribute as much as I learn.