My 2014 - The Rock

[iCryWheniGoPoop]

It's not the size of the lift that causes decreased gas mileage. It's the size and weight of 35" tires.

It's both... Tires probably more so but the bigger windwall you create, the more it's gonna cause drag.

[LTZ2014]

It's both... Tires probably more so but the bigger windwall you create, the more it's gonna cause drag.

Agreed, but the tires are by far the main cause. My 08 sierra had 12 inches of lift.

 

Anyways, truck looks good OP. Now you need a tune.

[jjwile2]

I was getting 18-16. Now I'm getting 16-14. I'm not sure if that is accurate because the MPH hour is off and I'm not sure if the gas mileage is calculated on the console from the miles it thinks I'm going? I looked into the HyperTech that says it recal's but I never did that so I'm not sure if I can find a place to do it?

 

Does anyone know if this is straight forward?

[CAtaylor]

The Hypertech is pretty straight forward. I have been using one that the dealership gave me when I bought the truck. Just plug it in and answer a couple questions on tire size and gear ratio and you are done. Takes about 5 minutes.

[jjwile2]

thanks. I'm ordered it I'll report on the Hypertech as soon as I apply it.

[cmpcpro]

Quick question on the tire speedo issue.. I know if you tune there can be warranty issues, as the "number" changes.. What about just changing the speedo? Does that pose the same issues? Truck looks great by the way.

[ram1067]

Nice! What color is that?

[daddis01]

I'm feeling like that front air dam is distracting slightly from the look. I doubt it's assisting with gas mileage anymore. Great looking rig!