For 1990-2009 cars

# COLD START DRIVEABILITY DRIVE LINE SHUDDER

#### VEHICLES AFFECTED: 1985 'N' and 'X' Series Vehicles Equipped with 2.5L (Code R, 2, U) Engine, Automatic Transmission and NM5 Emission System

If a vehicle indicated above exhibits cold start driveability, idle quality or drive line shudder and cannot be corrected by published service procedures, a new PROM may be installed.

Listed below are the PROM applications.

APPLICATION SERVICE PROM P/N ----------- ---------------- 'N' Series (L68) 1227781 'X' Series LR8 16049334 (2:8 Axle) 'X' Series LR8 16049342 (2:39 Axle)

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.