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<blockquote data-quote="snow" data-source="post: 268208" data-attributes="member: 1056">As stated above&nbsp; its realitive to your gear ratio,if your not sure what the truck has check the glove box ,you'll find a list in 3 digit code what your rig has.,trucks with over 8500lb GVW&nbsp; won't have mpg's rating,rather considered stump pullers in the HD trucks,I suggest installing a programer,check online for &quot;hyper tech&quot;&nbsp;programer for GM gas engines (3) settings,easy to download into your PCM moduel,level (3) is for torq and hp up to 100hp if my memory is right.and yes GM&nbsp; was behind the 8ball on power,E.P.A was on GM like a duck on a june bug because of over all fuel economy through out they're product line.Its true whats stated about the all new 2020 HD trucks phased out the 6lit hello 6.6 gasser 401hp HD trucks are completely re-designed,they sit 2&quot;s higher in ground clearence,box is 2&quot;s longer.down side is std gears on the 2500HD I looked at are 3.42 gears no more 4.10's(yet).power and pulling effincence can't beat the 6.6lit duramx diesel,just stay away from 2001/02 models internal injectors) if they need replacing....boooookooo bucks to redo/replace,not so with newer models (external injectors)goodluck which ever way you go.</blockquote>

[QUOTE="snow, post: 268208, member: 1056"] As stated above its realitive to your gear ratio,if your not sure what the truck has check the glove box ,you'll find a list in 3 digit code what your rig has.,trucks with over 8500lb GVW won't have mpg's rating,rather considered stump pullers in the HD trucks,I suggest installing a programer,check online for "hyper tech" programer for GM gas engines (3) settings,easy to download into your PCM moduel,level (3) is for torq and hp up to 100hp if my memory is right.and yes GM was behind the 8ball on power,E.P.A was on GM like a duck on a june bug because of over all fuel economy through out they're product line.Its true whats stated about the all new 2020 HD trucks phased out the 6lit hello 6.6 gasser 401hp HD trucks are completely re-designed,they sit 2"s higher in ground clearence,box is 2"s longer.down side is std gears on the 2500HD I looked at are 3.42 gears no more 4.10's(yet).power and pulling effincence can't beat the 6.6lit duramx diesel,just stay away from 2001/02 models internal injectors) if they need replacing....boooookooo bucks to redo/replace,not so with newer models (external injectors) goodluck which ever way you go. [/QUOTE]

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