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  1. #1

    Default Key crank and 33's

    I am getting a 2005 Z71. Just looking at my options and what it will look like. I want to level it and tuck some 33's under it. What type of gas milage are you 33" guys getting?

  2. #2
    Legend tlperry68's Avatar
    Join Date
    Oct 2008
    Huntington Beach, CA


    If you are getting the big gas motor expect to loose 2 to 3 MPG unless all of your driving is highway then it will be a bit better.
    Trevor - Huntington Beach, CA
    2007 GMC 2500 4X4

  3. #3
    Jr. Engineer
    Join Date
    Jan 2009
    Rochester, MN


    On my 97 Suburban 5.7 with 5" of lift and 33s I was seeing about 1.5 mpg less than stock on the highway. With 35's it went down about 2.5mpg. While theoretically your highway MPG should be better, it's going to place a harder load on your powertrain from the different overall gear and the increased ride height and will probably decrease your mileage.
    99 Silverado Z71 4.8
    2" Suspension lift (Add-a-leafs and leveling keys)
    Long tube headers with 3" offroad Y-Pipe
    Volant Cold Air Intake with Ram Air Intake Tube
    Jet Mass Air Flow Sensor
    Diablosport Predator Tuner

    Previous Truck:
    97 Suburban K1500
    3" Body lift
    2" Suspension Lift (Add-a-leafs and cranked up torsion bars)
    35" Yokohama M/T's
    K&N Intake
    Airraid Throttle Body Spacer
    Hypertech Programmer
    Dual Flowmasters

  4. #4


    Im not sure what engine it is coming with. Im getting it from someone who repairs salvaged vehicles. I needed a work truck, 4x4,extended cab,v8. What is the most common engine option in the 2005 z71's? Any pictures on 33's?

  5. #5


    it is probably a 5.3l V8. Your gas mileage also depends on the kind of tires you get. It will decrease more with a mud terrain tire rather than an all terrain tire. I would recommend the BF Goodrich All terrain if you are doing mostly on road driving. they are pretty quiet and are great in almost anything
    95 GMC Sierra 2500
    3" Body Lift, 33" Goodyear MTR's
    5.7L 350 TBI Edelbrock SDT Exhaust, Flowtech Headers, K&N Intake
    Sold :(
    1999 Jeep Cherokee, 3" Rustys lift, 33" BFG MT's, locked, armored: Rolled :(
    2000 Jeep Grand Cherokee Limited. K&N Intake, Custom Kolak Exhaust

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