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Gas mileage question

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by BigrRed18, May 2, 2012.

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  1. BigrRed18

    BigrRed18 Rockstar

    I currently am running a 5 inch rcx lift on 33 and wanted to know if you guys thought if i changed my lift to the 7.5 inch lift and put 35s would i see much worse gas mileage than i am already getting. Around town i get about 12.
  2. 07XCSB

    07XCSB Active Member 2 Years 1000 Posts

    Not if you regear for the upgrade in tire size.
  3. BigrRed18

    BigrRed18 Rockstar

    okay would it cost much to regear it?
  4. mfleetwood

    mfleetwood Rockstar 4 Years ROTM Winner 5000 Posts

    Not sure if you have a 2wd or 4wd, but expect to pay about ~$500 to ~$600 per differential if you have it professionally done.
  5. BigrRed18

    BigrRed18 Rockstar

    yea mine is 4wd
  6. mfleetwood

    mfleetwood Rockstar 4 Years ROTM Winner 5000 Posts

    Yeah...that just doubled your cost over a 2wd. I spent about $1,200 last year, but got some quality gears and a nice warranty. But, it was definitely worth the investment in a number of ways.

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