The correct installation torque of the two crankshaft sensor to front cover attaching bolts is 30 N.m (22 lb. ft.). Figure 19, on page 6A5A-10 of the 1985 'N' Series Chassis Service Manual should be revised to show this information.
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.