I knew my truck didn't do great, but I didn't reallize it was this bad. 12.2 average on a calculator two tanks in a row. Normal driving too. Not very impressed
LMM fuel mileage sucks!
- Thread starter KidwickedLMM
- Start date
I have a similar issue with mine...u can see what I have in my sig and I would have done all that regardless of mileage. I was getting 11-12 hand calculated stock and now only get 14 winter avg and 16 summer. Of course i run larger tires and aftermarket wheels too sothat doesn't help. My 06lly with similar mode but excab instead of crew avg around 18-20. Driving over 100 milesa day I miss my lly mileage.
X3!
do you have a pre tuned ecm or do you own a V2?? If you own a V2 i got a couple of mileage tunes i can send you to try.
do you have a pre tuned ecm or do you own a V2?? If you own a V2 i got a couple of mileage tunes i can send you to try.
Did you ever get this figured out? im having the same problems with my 07.5. had everythign checked and put in a new stock air filter and cleaned my maf still getting horrible. Really sucks going from my lb7 thatwas getting 22 easy and almost using all the fuel in the tank before low fuel light went on to now this lmm getting 10 mpg and only like 250mile out of a tank before low fuel lights on... please let me know. my tuner is motor ops aka duramax tuner
Mine does good to get 12, 210-260 a tank and that's averaging a 22 gal fill up, junk. My LLY did better when it was on it's dying breaths.