It's been awhile since I posted. Wheels, brakes, suspension drop

[skyhighsami]

Would it be possible to get the 14" rotor and caliper relocation bracket for a GMT900 and install it on a GMT800 using the GMT900 front caliper and GMT800 kit for the back?

 

[adriver]

Would it be possible to get the 14" rotor and caliper relocation bracket for a GMT900 and install it on a GMT800 using the GMT900 front caliper and GMT800 kit for the back?

No, the hat size for the two rotors is about 2 inches difference.


FRONTS:

The GMT800 front brake setup that you want to replace is your 12.8" rotor with a single piston caliper. The upgrade from the GMT900 is a 13" rotor with a thicker (better vented) rotor, but it has a dual piston caliper with a bigger pad.

GMT800


EARLY GMT900


LATE GMT900



The 14" rotor is from the SSBC kit, or perhaps you could search and I would guess someone has already tried, but the K2XX (2014+) model Silverado has a 14" front rotor, NO CLUE if it fits, but if anything OEM does, that's going to be it.


I had this saved on a notepad. if this helps to expand your search. The larger 13" rotors came as early as 2005 on Silverado and sierra depending on trim. You just need to get the pads that match which ever set of calipers you get.

2008-2013 SILVERADO 2008-2014/2016 ESCALADE/XTS AVALANCHE/SUBURBAN/TAHOE/YUKON/EXPRESS 1500/SAVANA 1500/


2005-2006 SILVERADO/SIERRA 1500 EXCLUDING: Hybrid, SS, HD, & rear disc; Had the larger 13" rotors.
2007 SILVERADO/SIERRA 1500 Had the same 13" rotors but had the same earlier pad # as 05-06 (not sure if thats classic only).

- YEARS ---- PAD # ------ MODEL ---------------------------- YEARS ----- PAD # --
2005-2007 - D1092 - SILVERADO/SIERRA 1500 ---------- 2008-2014+ - D1363
------ 2007 - D1092 - AVALANCHE 1500 ------------------- 2008-2013 -- D1363
------ 2007 - D1092 - ESCALADE (EXCL EXT & ESV) ------ 2008-2015+ - D1363
------ 2007 - D1092 - ESCALADE (ONLY EXT & ESV) ------ 2008-2014 -- D1363
------ 2007 - D1092 - SUBURBAN 1500 -------------------- 2008-2015+ - D1363
------ 2007 - D1092 - YUKON 1500 (INCL XL & HYBRID)-- 2008-2015+ - D1363
------ 2007 - D1092 - TAHOE ------------------------------- 2008-2015+ - D1363
------------------------ EXPRESS VAN 1500 -------------------2009+ ------ D1363
------------------------ SAVANA G1500 ------------------------2010+ ------ D1363



REARS:
The GMT900 has a larger rotor (13.6") than the gmt800 (13"), but for some reason its a single piston caliper. That's the reason to stay with the GMT800. Just not worth it, until someone comes up with a better caliper to use on them.

 

[skyhighsami]

What pads seem to be the best

 

[SRQYukon]

Mines a 2003 and I have 2" drop spindles 2" shorter coils on rear with 22 x 9.5 snowflakes and 285 45 R22 Michelins. I have yet to do the GMT900 front brakes, but that is planned. This tire wheel combo is a snug fit, but minor trimming of the rear fender liners was all that was needed. When I tow my trailer and go around a cloverleaf on-ramp I get a little rubbing but it is still on the liner not the metal parts. I may add some 1/4 spacers on the rear and that would stop that. I also have the Spohn panhard bar which allows fine tuning the rear axle centering. The stock bar in non-adjustable. So when lowering it may put the rear axle slightly off-center. I had 22 x 10 Momo's before and 305 40 R22s but that tire size chewed up the front fender liners only when backing up while turning. I almost went with 20s instead this time, but I really like the 22s. I really happy with the look, ride and stance. Here are some pics:

 

[skyhighsami]

You need an adjustable panhard bar you can center the axle back under the truxk

 

[SRQYukon]

I notice that many owner put way more emphasis on wheel than tires. I know the wheel provide the aesthetic appeal and we all like something that enhance the appearance. But I found that after going through two complete suspension changes (lowering only), that the biggest ride improvement came from new tires. I originally have generals on the stock wheels so the ride was pretty good then went to 22s with 305 40 R22 Hankooks and the ride was pretty harsh (had Eibach 2" lowering keys and 3' shorter rear coils). Then I replaced the keys with DJM dropped spindles and coils (2/2, this time) and went with Bilstein 5600 shocks on all four corners and Toyo tires. Improved the ride considerably (mostly because of the suspension changes) but still I lot harsher than stock. My son-in-law has a 2012 Yukon Denali and he told me that his Michelin Defender LTZs improved his ride dramatically. So I took the plunge and purchased a set at about $1000. I went with 285/45 R22 this time. I could not believe the difference. Especially on rough pavement. My Yukon finally rode the way I wanted it to from the beginning of my suspension mods. Firmer than stock ride, lower than stock stance but smooth enough that my wife doesn't shriek when we ride on rough pavement. And when it's loaded it rides even better. So all I'm saying is do your homework on the tires and get something that works with your suspension. Don't spend all of you effort on choosing wheels. And the larger the wheel (I'm talking street, not off-road) the more important this is because you are typically going with shorter sidewalls which transfer more vibration through the suspension. The GMT900 I think have improved suspension to begin with, so maybe not quite a much of a factor as the GMT800.