2007-2013 Silverado: Crankcase Flush
Time: 30-45 min
Difficulty: easy
Cost: $40-60 (cost of an oil change, treatment chemical)
A crankcase flush is good maintenance, but it can also correct a false "low oil pressure" problem on GM 5.3L and 6.0L engines. The oil pressure sender sits at the end of an oil passage on top of a small screen filter. With time (especially with a poor maintenance history) the oil passage ways and fine screen can be restricted by a buildup of oily sludge. This prevents the sensor from getting an accurate reading. The indications may include fluctuating or low oil pressure readings on the gauge, and possibly a "Check Engine" light with a PO560-563 code. Performing a crankcase flush can often clear up the problem.
Watch the video below to see a crankcase treatment performed on a 2011 Silverado 1500 with the 5.3L V8.
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