Turn key on (engine off) and press and release gas pedal 3-5 times until oil life message resets.
go to the screen on your dash that says 0% oil life remaining and hold the check mark for a while (15seconds or so)
With filter 6.1 quarts
go to www.kofla.net
6 Quarts of 5W-30 oil only
6 qts.
6 qts 5w30
For the oil it holds 6 quarts with oil/filter change.
5/30 or 10/30 and fully sintethic platinium
On the 5.3 ... It's up behind the engine
Factory says----5W30 in the winter time. Be sure to use A/C delco oil filter.
Engine, with Wix Filter 51042..........6.0 quarts [1]1. After refill check oil level.Hope This Helps.
It should use 5W-30. It will say on your oild cap, but that is probably what is recommended.