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Re: what are you guys getting for mpg?
I work at a chevy dealer, and in my opinion AFM sucks. It does not seem to help mileage that much, and greatly increases potential for mechanical problems. I have seen a couple at work with AFM problems related to lifters.
Not the same truck, but my 06 5.3 2wd ECSB with 20's and 3.73 gears gets between 14.5 and 15.5 depending on weather/temps. So call it 15mpg average overall. I have 40k miles and originally had 3.23 gears from factory. Prob lost 1 mpg with gear swap, but comes alive quicker. I also have the GM cold air kit and a one in two out flowmaster.
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