DIESEL-BASIC SERVICE ENGINE FEATURES

FUTURE 1980 MODEL DIESEL BASIC SERVICE ENGINES WILL HAVE 1981 FEATURES INCORPORATED THAT IS 1981 CRANKSHAFTS, ROD BEARINGS AND MAIN BEARING CAP BOLTS. 1981 SERVICE PROCEDURES MUST BE OBSERVED WHEN SERVICING THESE COMPONENTS. THESE ENGINES CAN BE IDENTIFIED BY NOTING THE DISPLACEMENT CASTING CODE ON THE SIDE OF THE BLOCK. ALL DIESEL ENGINE BLOCKS WITH 1981 FEATURES WILL BE MARKED 350DX.

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.