My own recomendation after trying all types of AcDelco pads:
ACDELCO 1710976 {#19208132} GM Original Equipment
Rear; 4WD
ACDELCO 1710949 {#15240794} GM Original Equipment
Front; 4WD
These are OEM, and in my opinion, the best so far. I have almost 30000 miles for a front set, and 50000 miles for a rear set, with a huge brake quality.
Other AcDelco Pads gave me problem in my Brake test anually. My left front tyre was descompensated from the right tyre. I change pads to OEM and problem resolved.
In my participation in Rallyes TT of Spain, my rear AcDelco pads (not OEM) take so much heat that is smell burnt the rear brakes. I changed the rear pads to OEM, and problem resolved in the next rally.
Just my opinion, hope its help.
Guerrero