redbrew

i just purchased a 2012 Silverado LTZ with less than 30k miles. It has the 5.3 liter flex fuel engine. While I do love the truck, it does seem to be down on power somewhat. Is this due to it being flex fuel? I am not that familiar with this engine. I am guessing that a tuner, cold air kit and good exhaust might wake this engine up. Any suggestions or am I missing something?

sledge.impy

are you using flex fuel?

redbrew

Not yet. Its kinda hard to find in my area

tech2

what vehicle are you using for comparison... dodge hemi? than yeah...my 10year old hemi would smoke any stock 5.3

redbrew

Compared to my Dads '09 Silverado, it seems to be a bit less responsive.

country_09

It's just the weak dealer tunin and you probably have a 6 speed and he has the 4 speed. They put lower gears in the 4 speed which helps when you go stop light to stop light. You have higher gears more than likely. A good tune will wake it up big time though

redbrew

Makes sense. I do have the 6 speed shiftable automatic. Why they made that option I have no idea. But I am looking for a good tuner. Any suggestions? Banks? Bullydog? Hypertech??

country_09

None of the above. Blackbear performance, gowheatley.com or a reputable custom tuner around your area