I am not looking to be the fastest truck out there or am i wanting to rebuild my hole truck. I have a 06 duramax with 170000 miles and i am looking to get better mpg. I have nothing done right now. so i need the low down on what to do first and where to go.

 

efilive, thats about all if you want mpg, the stock intake and exhaust are good to go!
other tuners can give you better mpg's but from what i have seen this yields the best results. i had idahorob tune mine and i am pretty sure that alligator performance here can hook you up with his tunes

 

EFI live all the way

I went from 13-17mpg stock to 15-22mpg with my tunes from Duramaxtuner.com