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Low gas milege.!!

This is a discussion on Low gas milege.!! within the GM Trucks forums, part of the Vehicle Specific category; Just recently installed 2002 vett ls1 engine with 4l65e trans with 3:73 gear in 1994 sportside. Was told to expect ...

  1. #1
    Junior Member hgsaint's Avatar
    Join Date
    May 2006
    Location
    alabama
    Age
    73
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    blue/beige
    1994 chev sportside

    Low gas milege.!!

    Just recently installed 2002 vett ls1 engine with 4l65e trans with 3:73 gear in 1994 sportside. Was told to expect around twenty [20]MPG I only get 13-14 anyone with similar transplant with suggestions.?

  2. #2
    Member Nitrous's Avatar
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    Dec 2005
    Location
    Houston
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    191

    White
    97 GMC with 02 LS6 engine

    Remember your truck weighs pretty close to 5000 lbs. I installed an 02 LS1 in my truck with a 220/220 - 581/581 - 115 cam, 3200 stall 4.10 gears and get 16-17 depending on my driving. I haven't really kept my foot out of it to see what it really get's. Probably not much more than what I'm getting now. Blows the hell out of the Vortec I had but I bought HPTuners so I can play with the tuning. You might want to get some tuning done if you left it stock. Talk to Allen over at Nelson Performance and he'll hook you up. Good Luck!

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