Searching by year, make, model and engine, this is from the O'Reilly site.
SAE 5W-30 C3; 1 Quart; Meets GM Dexos 2 Motor Oil
It shows they can get it from their distribution center. I'm sure other parts stores can too.
2018, 3500, SRW, LTZ, Z-71 4X4
Passed down to my son - '03 Silverodo LT, CC, D/A, 4X4, Hypertech, Rino, Bilstiens, TTT's. Eric's pump upgrade, 4" MBRP exhaust, AFE Intake.
2015 Camaro SS2
'06 Mobile Scout 31 BWFS 5th wheel
Owner @ Port Allen Tire & Service