I have a 2005 chevy Tahoe LS1 327 I replaced the oil pump the motor lost oil pressure and the lifters are rattling after replaceing oil pump it has the same problem any suggestions. ???
Are you sure you got the oil pump o'ring in the correct spot and seated? Was the oil pickup screen plugged with sludge? How many miles on this Tahoe?
Every thing bob said,and to add,when pump went out may have damage the lifters and guides from having no oil on them.
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