Here I show a before and after changing the oil pickup tube O ring on my 2010 Chevy Avalanche with the 5.3 LS engine because of low oil pressure. There was some leaking from the oil cooler lines block where it bolts to the oil pan which may have been remedied just by tightening the bolts. This video would cover the Chevy Silverado, Tahoe, Suburban, Avalanche and more with the LS engine.

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