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chevy silverado 6L gas mileage

Has anyone used Hypertech and new cat back for better mileage

chevy silverado 6L gas mileage

Postby 2tall [OP] » Aug 31 2012, 6:40pm

Hi Guys
Has anyone used Hypertech and a new cat back system to increase gas mileage on the 6L vortex truck, I am thinking about buying a 2004 - 2007 crew cab, short bed for more power for trailer towing and room for grand kids.
What kind of city mileage and HWY are you getting.
Thanks Ron
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Re: chevy silverado 6L gas mileage

Postby 1500VHO » Sep 16 2012, 6:39am

Hi 2tall,

I have used the Hypertech Max and Corsa dB cat back exhaust system on my 2005 Silverado VHO. I also installed a Volant CAI. I did all of this for performance. Gas mileage was a little better. My usual combination of 80% city and 20% highway, got me about 0.2 - 0.5 mpg improvement.

Not much I know. Where I really saw improvement was with a Diablew tune... You can purchase a InTune or Trinity programmer from him or elsewhere. Either way, getting a tune from Lew got me 2.0mpg more than before. Same type of driving. I just recently got 15.6mpg with my normal city/highway driving. I don't know about all highway driving, just yet. I have not made any long trips recently...

I hope this helped, :D
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Re: chevy silverado 6L gas mileage

Postby gasguzzler6.0 » Sep 18 2012, 12:57am

on my 2500hd i have a k&n fipk, flo pro muffler and a jet 25% reduction underdrive crank pulley and while it did have a noticable difference in performance at WOT, it did NOTHING for inproving my fuel economy. i also bought a superchips flashpaq and that made a big difference in performance on the 87 octane tune but it only increased my mileage about .6 mpg

as far as economy i cant get more than 10.6mpg in the city, and 13.5 hwy.
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Re: chevy silverado 6L gas mileage

Postby TruckRookie » Jun 23 2015, 12:42am

I got a 05 2500HD with the 410 gears and I am only getting a combined 10.3 mpg. I am in need of trying to find the best way to improve my gas mileage.
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Re: chevy silverado 6L gas mileage

Postby zachfletch573 » Jun 26 2015, 1:39am

I have a 2002 6.0L with a superchips, gibson cat back, and an AFE air filter. Also 33 inch tires and 4.10 Gears, I got 14.5 Mpg on the highway and I get about 10-11 mgp in town
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Re: chevy silverado 6L gas mileage

Postby GTX63 » Jun 30 2015, 4:25pm

The 6.0 was built for power and longevity before anything else. If you are pulling trailers, campers, boats, etc, the mileage can't be the priority; muscle and safety should be. That said, my 4.10 geared 6.0 runs about 12mpg unhooked and 14 highway. Towing anything will drop that to about 9mpg. For the money of what a tune may or may not bring, personally I'll keep the cash in my pocket or spend it on the fuel. It isn't my primary driver, it is mainly work and then camping.
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