SURGE AT 45-55 MPH WITH TRANS. CONVERTER CLUTCH ENGAGE

Model and Year: 1987-88 G-CAR WITH 5.0L ENGINE

TO: ALL CHEVROLET DEALERS

Some 1987-88 G-cars equipped with 5.0L (VIN H) engines may exhibit a slight amount Of surge under certain conditions, when cruising or at light load in fourth gear (overdrive) at speeds of 45-55 mph with the torque converter locked. This condition may be addressed by installation of a new service calibration PROM, P/N 16139524.

Labor Operation Number: T0500 Labor Time : .5 Hour

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.