For 1990-2009 cars

# OIL FILTER LEAK AT SUB ZERO TEMPERATURES

UNDER EXTREME COLD START CONDITIONS, A HIGH PRESSURE SURGE OF ENGINE OIL ON START UP CAN CAUSE BULGING OF THE FILTER WHICH COULD CAUSE AN OIL LEAK AT THE OIL FILTER SEAL. THIS CONDITION CAN BE CORRECTED BY INSTALLING A NEW OIL PUMP COVER ASSEMBLY, 3.0L V6 PART NUMBER 966094, 3.8L AND 4.1L V6 PART NUMBER 966093 AND 3.8L TURBO V6 PART NUMBER 966092. THE NEW COVER ASSEMBLIES CONTAIN REVISED DESIGN OIL FILTER BYPASS AND PRESSURE REGULATOR VALVES.

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.