CONDITION: Oil filter is difficult to remove, or oil filter fitting may unscrew from the engine block and remain seized inside the oil filter.
CAUSE: Oil filter threads bind on oil filter fitting threads.
CORRECTION: If the oil filter is difficult to remove or install from the engine, or the oil filter fitting remains inside the oil filter upon oil filter removal, replace the oil filter fitting with a new oil filter fitting (P/N 21000467) and torque to 30 N,m (22 lbs. ft.).
After repairs have been completed, check the engine for oil leaks.
PARTS REQUIREMENTS: 21000872 Assembly-Oil Filter 21000467 Fitting-Oil Filter
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.