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  1. #1

    Default New guy who knew better...

    Just found this site, and had to join to see what I can learn about these Suburbans. I just got mine about a month ago, an '88 with only 48,000 miles on it, and like it a lot except for brutal gas mileage and a few quirky trim things it has. Mine's a 5.7 liter, automatic, 2wd, with a tow package and a 40 gallon gas tank, which luckily I won't need to fill that often. If anyone has tips on increasing gas mileage, I'd be quite interested. I knew that this thing wouldn't be the cheapest critter to drive, but I couldn't pass it up, it was in such beautiful condition... I just took about a 400 mile run to take my youngest to college, and I'm almost afraid to check the mileage. I ran through around 30 gallons, if the gauge is accurate! Nice running truck though... for 13.3 mpg.....

  2. #2


    Welcome to the forum!! 13.3 MPG doesn't sound too bad for an '88. Of course, I could be wrong. As far as improving your gas mileage, you can never go wrong with the popular trio of intake, exhaust, and programmer (or custom tune). There's lots of information about all three on this site. Try doing some searches and I bet you'll find what you're looking for. If not, just ask! Good luck!
    Hallsville, TX

    2005 Silverado 1500 LS Crew Cab 5.3L 2WD
    Magnaflow Exhaust
    Hypertech Max Energy Programmer
    Suspension Leveling Kit
    Putco Element Window Visors
    Carriage Works Billet Grille
    TruXedo TruXport Tonneau Cover

  3. #3
    dwill3015's Avatar
    Join Date
    Jan 2007
    Yacolt, Washington
    Blog Entries


    Welcome to the site! You will enjoy your Suburban. I have an 87 Blazer with the same setup (5.7 TBI, 700R40) and what i did to boost performance and economy is a performance chip, throttle body spacer, better breathing air cleaner (I just turned my lid upside down and it made a big difference) , and even dual exhaust.
    Washington State
    2006 Silverado 2500HD LT3 4X4 CC SB Duramax LBZ
    Tuff Country 6" lift, 35" Toyo M/T's on 20" Ultra Peacemaker wheels, Quadzilla Stealth2 programmer, Diamond Eye 5" cat-back exhaust, factory Special order color Yellow.

  4. #4


    Welcome to the site! There are a lot of "Sub's" showing up on the site. I see some really good deals around here on them. Good luck!

    2010 Z/71 Colorado C/C
    Black 4X4 w/5.3L V8
    2007 Winnebago Adventurer
    w/8.1L Chevy & Allison 6spd.
    Canyon Lake, Texas

  5. #5
    Davandy's Avatar
    Join Date
    Jun 2005
    Haasdonk Belgium


    Welcome to the site
    Peter Smet
    Haasdonk, Belgium

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