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  1. #1

    Default new guy: Stephen King, 1997 K2500, 7.4L Suburban

    HI: I am joining becasue I need some advice!

    I have 1997 K2500 Sub with the 7.4 liter in it. I have added a cold air intake, cat back exhaust, and Iridium plugs. I am going to add an MSD ignition this month. I really like travelling in this, it is solid, good ride, good visibility.

    Is there any way to get the gas milage up from 13\15 MPG? We don't use this vehicle very much except for lumber yard runs, some winter commuting and the occasional long trip. I can retire so I see myself doing a lot of travelling in the future, plus my mom is 8 hours away.

    So the question is what else can I do to up the MPG? I can add headers later on, would that help?

    One alternative I have read about is taking out the 454 (its 15 years old) and replacing it with an up to date 383 either supercharged or not. Another was to replace the 454 with a supercharged 350 fuel injected.

    Or should I just go for a late model K1500 and replace the stock engine with a crate engine?
    Last edited by Stephen King; 09-05-2012 at 08:14 PM.

  2. #2


    Welcome to GM Truck Club!

    If you don't get a response in the next day or so on this then I recommend posting your inquiry in the 'Technical Forums' section as appropriate to the type of issue you have ... or in the 'GM Platforms' section specific to your vehicle. You'll reach a wider group of the forum members that way ... and target your inquiry more directly to those who might already have experience with it.

  3. #3


    Welcome to the club, someone should be able to help you. do what surreal said and re-post
    Tim Walters (Curky)

    Wrangler AT/S 265/70R17 - Trail-FX window vents - Husky fitted splash guards - Silver Star zXe - Leveling kit -

  4. #4


    Welcome to the club, it's good to have you aboard.

    2002 Chevrolet Silverado Extended Cab SportSide: See Mods in My Garage

  5. #5
    Sr. Engineer
    Join Date
    Feb 2012
    Western Maryland/Wyoming


    Hi, welcome to the club. Wish I got 15mpg with my big block.

  6. #6


    Welcome to the G M T C !

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

  7. #7


    Welcome to the club!

    2011 GMC SIERRA CREW CAB 2WD W/5.3

    Convenience Package
    : Adjustable Pedals, Remote Start, Electric Rear Window Defogger, Rear Parking Assist

    Power Tech. Package| Volant CAI| GMC Upgraded Grill| Line-X Premium Bedliner| AVS Smoke Headlight Covers| Demolded| AMI Black Grill Emblem| AMI Black Rear Emblem| EGR In-Channel Window Visors| IPCW Third Brake Light| IPCW LED Fiber Optic Tail Lights| IJDM Dome & License Plate LED's| Flowmaster Exhaust W/ 3" Black Chrome Tips| OEM 20" Rims W/ Goodyear Eagle LS2

    You can't get away from the STORM!

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