My 08 Sierra with the 5.3 does it sometimes it got better when I switched to AMSOIL but will still do it if the engines oil gets low ( the engine consumes a quart every 9,000ish miles ) it doesn't bother me though
19' Skier 351W PowerSlot Deluxe
Long gone is the Trans AM
For your AMSOIL Synthetic Oil needs contact me.
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ZO number 2033054