i just bought my 06 and found out it has the flex fuel motor in it can i still use all the normal performace bolt-ons from a 5.3L? and does anyone know how big the fuel tank is i put almost 23 gallons in it the other day and it was at a 1/4 tank it just does not seem right.

 

probably a 8 gallon tank..

 

i have an 06 Z-71 with the flex fuel and it has a 26gal tank (ext cab model).

yes most every bolt on the fits a normal 5.3 will work with a 5.3 flex fuel. they are the exact same motor with a few modifications to the computer to recognize the ethanol and some upgrades to the fuel system because ethanol is more corrosive.

i have a k&n 63 series, 40 series flowmaster and a hypertech max energy. most programmers except for a special diablo predator do not recommend using ethanol fuel with them. other than that rock and roll.

 

so the onlything i have to worry about is not using e-85 if i get a programer you are saying? there is only one in sandiego any ways

 

yea the only company that makes a programmer for e-85 use is the Predator. i cant get it here in VA anyways so i dont worry about it.

what is your truck 4x4, ext/crew cab? what kind of mpg are you seeing right now

 

it is 2wd, reg cab with a long bed. i am getting 22.3 on the highway i dont do much city driving

 

Hypertech makes a "Alternate Fuel" performance tune that can be used with crappy gas and E-85, BUT Predator has one too and it is much better.

 

so would i be better getting one for the flex fuel or one just for a normal 5.3L. there in nowhere near me that sells the e-85

 

If you ever plan on running E-85, I'd do my homework. If not, just get a Predator and either uninstall the "custom tune" when you run E-85, or have someone make you a tune just for E-85, but then you will have to switch back aqnd forth from one tune to the other when you use 85 or 87

 

THANKS FOR YOUR HELP. HAS ANYONE TRIED THE BULLY DOG POWER PACK THE TRIPLE PACK?