I just did the gmt900 upgrade. Interestingly the "gmt900" fronts also cross reference to 05-06 1500 trucks w/ rear drum brakes... I didn't know that until I was looking at applications charts.
So far I'm super happy!! I used all Raybestos including their brand new optical calipers (lifetime warranty).
I spent a night going over this recently. When I tried to save it there was a glitch and I lost pages of the complete information on this. (Was going to be the ultimate complete stickie on this). I plan on doing it again, but here's what I have so far..
2005-2006 SILVERADO/SIERRA 1500 EXCLUDING: Hybrid, SS, HD, & rear disc; Had the larger 13" rotors. (If it had the larger 13" rotors up front, it had rear drum).
------2007 SILVERADO/SIERRA 1500 Had the same 13" rotors but had the same earlier pad # as 05-06 (not sure if thats classic only).
ALL 2007 1500 Full size, ( :Silverado, Sierra, Avalanche, Escalade, Yukon, Tahoe, suburban) Had a different caliper and pad (part number) than the 2008-up. Yet, they all used the same 13" rotor. I don't know what the difference is in caliper, or pad, or if both will work or not for the upgrade.
- 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