2008 lmm tuning questions

Mar 6, 2021
36
0
6
Prescott Arizona
So I sold my 06 lbz got this lmm lift pump,4” deleted exhaust, dsp5, and a v2 autocal Idaho rob all this was done when I bought it thing is no position on the dsp5 feels any different?. Gas mpg sucks only 15mpg truck has a 6” rcd lift on 35s btw any idea if the tunes even are loaded?.
 

monster50iii

Member
Dec 5, 2014
308
4
18
You won't get mpgs with the lift and tires fwiw..

If you have the autocal plug it in and re-download the dsp5 file? Worth a try..
 

N2BRK

Active member
Dec 31, 2009
1,606
20
38
856 NJ
Many times it's a poorly installed DSP5 switch. Check the wires and check to make sure that they are fully inserted. I've fixed 3 in the past year and I'm not even a mechanic, LOL.
 

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