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Thread: 4.8 vs 5.3 questions

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  1. #1
    Haha i wish i had that. It would be easy just to look up and see it but my truck didnt come with it

  2. #2
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    Your dash panel on the left side of the wheel where the headlights are, you don't have the four button DIC panel to the right of the a/c vent?
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  3. #3
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    Here, buy one of these, remove your stock panel and reinstall this one. The wires for it are behind your dash panel.
    GM Parts Direct: Your direct source for Genuine GM Parts
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  4. #4
    Whats the little button for?

  5. #5
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    Quote Originally Posted by Goat08 View Post
    Whats the little button for?

    Little button? There is an opening for the headlight switch and the dimmer switch you have to transfer over from the original panel. The little button on the instrument cluster? About all its good for is trip setting. They swapped a set of GMC wheels onto my truck at the dealership and I automatically have 4 wheel air pressure sensors on the truck, not sure if the stock worktruck has them or not but they probably do.


    Drive like there is an egg between your foot and the pedal and mileage will increase. Is your airfilter dirty? Do you have any engine codes? Could your cats be clogged?
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  6. #6
    Join Date
    May 2009
    Location
    hot & windy
    Posts
    1,117
    Quote Originally Posted by Goat08 View Post
    ...2. Me and my buddy have the EXACT truck. Both 08 short bed regency after-style, with 275/55 20 wheels and tires. The only diff is he has a 5.3 and makes 15 mpg and i make 12 in the city. Thats with a K&N, shorty headers, and 93 octane tune from nelson. I also have a cutout and im testing that to see if it helps my mpg any. So what im asking is, why does he get better MPG than me?...
    dude, my 01 5.3/5 spd just got 16mpg mixed on this last tank.
    that's with 4x4, airaid, blackbear 93 tune, mellowtone catback. the real kicker was that this tank was mostly WOT runs (for filming exhaust comparisons & running dynolicious), 75-90 on the interstate (2 separate unavoidable issues that made me have to get to work fast), and some up/down shifting practice.
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

  7. #7
    Omg this is ridiculous. why is my MPG so bad? I mean yeah i hit the gas alot but why should it be any different than the next?

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