CRACKED CYLINDER HEAD INFORMATION

Some 2000 engines may develop coolant loss which may be due to a cracked head. The crack develops across the #6 intake valve spring seat area and continues across and behind the #4 and #5 exhaust valve spring seat. With the aid of dye check, the crack is visible to the unaided eye (see illustration).

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.