Hello guys well many of you may have seen my previous thread about the duramax that I was purchasing and the good news is i went ahead and bought it!!!!
No pics yet because it is at the shop till Monday getting e-brake fixed.
I have some questions for anyone who is willing to help?
-2007 LBZ with allison
-standard cab, 8' bed
-4" Rancho suspension lift
-315/75/16 Yokahoma AT's
The gas mileage on the dash says average is 14.3.
Do you guys think that I need a tuner to recalibrate the speedo and that might improve the gpms? Or do you think the gas mileage decreased this much do to lift and tires? If so will a tuner with economy tune improve mileage?
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