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  1. #1

    Question 95 Z71 Heavy Half??

    Hi All, first post and question. I've been told by my mechanic that I have a 3/4 ton - ton frame under my 1500. It has a couple of plastic tabs in the frame marked HD and I have noticed in my repair manual that there is a C3HD model. It is not mentioned often in the manual is this a "rare" thing? My VIN say's that my truck is just a normal 1500 but looking at the suspension you can tell that it's beefed up. If this is a heavy half would there have been any engine modifications to it? I would like to put a 383 in it as the 5.7 has 204,000 on it and is getting a little tired( doesn't burn oil though!) Any thought's on this being a rogue model? What have I got exactly? Any suggestions on the 383 swap? I will probably keep the stock 5.7 and re-build it and swap them as necessary. Thanks!

  2. #2

    Default

    Welcome to the forum. Do you have 6 lug or 8 lug axles on there?
    Dan
    1999 GMC Sierra 2500 350 vortec
    1967 Jeep M725 ambulance 230 tornado
    1990 Cherokee Limited- 3 inch lift on 33's
    ...and every one of em has issues

    If you have any questions or problems don't hesitate to send me or any other GMTC moderators a PM

  3. #3
    Legend tlperry68's Avatar
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    Default

    Call a dealer's shop, give tem the vin and they can tell you wat the truck was when it rolled off the line.
    Trevor - Huntington Beach, CA
    2007 GMC 2500 4X4

  4. #4

    Default

    welcome to the site

    2003 Z71 Silverado LS
    Access roll up cover
    Bed Rails
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    Waiting to be installed
    Two 8in RF HX2 punch( would have 12s but they got stolen)

  5. #5
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    Welcome to the site!
    Darcy
    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.

  6. #6

    Default

    Welcome to the site! There were some 'light duty" 3/4 tons sold in '95, but I don't know of any "heavy duty" 1/2 tons. The "VIN" should "tell the tale"!


    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
    Legend bry2500's Avatar
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    Welcome to the site!!!
    BRYAN

    "IF YOU DON'T TREAT IT LIKE A TRUCK IT'S JUST A REALLY BIG CAR"

    02' Avalanche 2500 Onyx Black
    8.1L Vortec
    43,000 miles

  8. #8

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    Welcome to the site!
    Matt
    Hallsville, TX

    2005 Silverado 1500 LS Crew Cab 5.3L 2WD
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  9. #9
    Jr. Mechanic
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    Welcome aboard. 'T'is mystery all.
    Paul



    Honda XRV750
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    1998 Suburban K1500

  10. #10
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    TrailLeadr's Avatar
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    There's probably more to it than anyone realizes. I know exactly what you're talking about, because my 2002 1500 Avalanche has the same little gray plastic tab on the frame that says HD on it. Suspension-wise my Avy is definitely a 1500, of that I have no doubts.

    You might want to message 84Fiero123 and ask him. I haven't seen him online much lately but he used to work the assembly line at GM and might have some insight into what that's about.
    Patrick
    Rhode Island


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