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Thread: Any GMT900 Suburban/XL 2500 builds here?

  1. #1

    Default Any GMT900 Suburban/XL 2500 builds here?

    Hard to come by built 2500 SUVs... and those that I do find are normally huge lifts with small tires and 24" wheels. Figured this would be a better place to look for like minded owners with "moderate" builds. I have a small lift for mine on order and am going through the common internal struggle of which tires and which sizes. Doesn't help that I can't find many examples through searches to help make the decisions.

  2. #2
    Join Date
    Dec 2014
    Location
    Alberta
    Posts
    8
    I believe the 2500 subs have the same front end as the Trucks? If so look at the kryptonite steering stuff. I've had a kit for 100k on my 08 duramax. Big beefy parts with a lifetime warranty. Put on a level lift with some good shocks and go.

  3. #3
    Quote Originally Posted by Glorifiedhabit View Post
    I believe the 2500 subs have the same front end as the Trucks? If so look at the kryptonite steering stuff. I've had a kit for 100k on my 08 duramax. Big beefy parts with a lifetime warranty. Put on a level lift with some good shocks and go.
    Yes, same drivetrain and steering as the 2500hd trucks (up till 2010, the trucks changed in 2011).

    I already ordered the Cognito 4" NTBD suspension lift with Fox shocks, and will be regearing to 4.56.

    Tires are what's perplexing. This is my 3rd GM truck so I'm very familiar with the trimming necessary to fit larger tires. I'm already running 305/60/18 with no lift, and they're not much smaller than most 33s, so I'm contemplating trying 35s with the lift... but most lifted burbs with 35s are running over 6". I want to keep my kit in the 4-5" range for better suspension geometry.

  4. #4
    Join Date
    Dec 2013
    Location
    Happy valley , Oregon
    Posts
    69
    I had a 99 with a 2" body lift and Ford keys in it and had no problem clearing 35s. The trimming needed to clear a 35 is minimal, there's a guy on here with 37s on his with it think a 3" lift
    well that didn't go as planned

  5. #5
    Quote Originally Posted by Smileyshaun View Post
    I had a 99 with a 2" body lift and Ford keys in it and had no problem clearing 35s. The trimming needed to clear a 35 is minimal, there's a guy on here with 37s on his with it think a 3" lift
    The gmt900 body style has a much harder time fitting larger tires than the older styles. gmt800 and earlier was a bit easier, especially if bumper trimming was required

  6. #6
    Join Date
    Dec 2013
    Location
    Happy valley , Oregon
    Posts
    69
    Lol I miss read what body style you where asking about , with a big enough hammer anything will fit
    well that didn't go as planned

  7. #7
    Haha that's the truth!!

  8. #8
    Think I have a plan...

    Current 305/60/18 ATZ's are 32.6x12.1 according to their spec. The 295/70/18 Cooper STT Pro's are 34.5x12... same width with an inch more sidewall.

    My lift kits being delivered today .... next step will be test fitting my current wheels on the spindle to see if theyll fit. They have 5.7" backspace which may be an issue. Worst case I get a new set with 5" backspace. Mickey Thompson MM-164B should work nicely and keep my current style.

    As a matter of fact, just found a picture of the Cooper/Mickey tire wheel combo lol
    Attached Images Attached Images

  9. #9
    Join Date
    Sep 2010
    Location
    Ft. Worth, TX
    Posts
    244
    That configuration (GMT-900 2500) is kind of a unicorn to begin with. Sub'd as I would like to see a nice one get built.
    My Rig/Trailer build-> 1973 K5 Blazer : Makin dead things deader since 1984

    Follow me on Instagram @elaffoon

  10. #10
    A unicorn it is... flew half way across the US to buy it.


    Might as well change the title and make this my build thread
    2012 GMC Yukon XL 2500
    Current Setup: No lift, trimming, 305/60/18 ATZ P3s
    Coming Soon: Cognito 4-6", ~35" STT Pro's, 4.56 gears

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