I just changed the oil in my 2014 Sierra with Kendall GT-1 full synthetic 5W30, the non-Dexos bottle.
Yes, the Titanium was what made Kendall GT-1 special. The dexos1 Gen2 Kendall (no Ti) isn't worth the extra money over ServicePro dexos1 Gen2, as there is no evidence or reason to think it is.
Dexos means noting to me I don't have one of their CAFE engineered messes with LSPI!
You're missing the main point with dexos1 oils. Its a tougher spec than plain old SN/GF5 oil. See the comparison chart below:
Add to that the new dexos1 Gen2 timing chain wear tests (SN/GF5 doesn't have that) and GMOD tests.