For 1990-2009 cars

# POOR COLD DRIVEABILITY/SAG/HES PROM INFORMATION CORRECTION

#### VEHICLES AFFECTED: 1986 'N' Series Vehicles Equipped with 3.OL MFI Engines (VIN Code L)

Some 1986 'N' series vehicles equipped with a 3.OL MFI engine (VIN Code L), may experience a condition described as poor cold driveability, tip-in sag, hesitation or surge.

If any of these conditions are encountered, and cannot be repaired using currently published diagnostic and service information, it may be necessary to install a new service PROM, part no. 16059958.

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.