I have owned a few GM SUVs with both the 5.3 and the 6.0 and 6.2 engines.I have a friend also is the service manager and his advice was to change the oil every 3000 and will lessen the chance of lifter failures.So far have not had one issue.My 2017 Yukon has 90K miles and my 2019 Escalade has 50K.FWIW,Tom
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