Riptide Outdoors

would either of these speed up with rpm’s? I let it warm up for a minute or two before driving but there’s still the noise a little and when I’m accelerating the sound speeds up. Sorry if that’s a dumb question

I just bought a 2011 1500 with the 6.2l 168k miles and its making a tapping noise at startup, almost like tapping your phone screen with your nail but a little more high pitched. The noise starts a few seconds after the truck starts and is pretty loud for about 20 seconds then slowly fades away. Its pretty faint once at temp and it goes almost completely away once its been at temp for roughly 10 minutes. I had a 2008 5.3 with 305k miles and it had lifter tick but this isnt he same noise, but also a different engine so it could be the lifters and just a different sound. Its not exactly cold here, mid 70s to low 80s in the mornings but thats still cool for an engine so my assumption was piston slap cause i know thats a common issue with these trucks, but wanted to get some other opinions on it. Truck runs and drive fine and everything else seems to be working but i just want to make sure im not ignoring the start of a larger problem. I tried some top engine cleaner and did a tank with techron cause i saw that recommended in some other thread but i didnt notice any difference after either one.

I was more so wondering how taking away some lift height and getting smaller and narrower tires would affect it, I just trying to give an idea of what all will be done. As far as programming it will probably get a tune from a local shop

I have a 2008 GMC Sierra 1500 crew cab with a 5.3, AFM has been disabled Right now I have a 3.5 in lift plus Bilstien 5100 so I’m at about 4.5 total lift with Tokyo mt 33x12.5, my mpg is about 12-15 highway and awful in the city. I’m think about going back to just a leveling kit and decreasing the tire size but I want to know if I’ll see any noticeable gain in mpg. I’ll also be getting a k&n intake and hopefully some long tubes so that may help some. Anyone have any idea what kind of mileage I can expect (I do have a heavy foot in the city but cruise control is always set on the highway 70-75 mph) Thanks in advance Justin