CRUISE CONTROL HILL PERFORM. SHIFT CYCLING BETWEEN 3 & 4

A POSSIBLE CAUSE OF SHIFT CYCLING BETWEEN THIRD AND FOURTH GEAR ON AN EARLY PRODUCTION 1982'B,C, AND E' CARS EQUIPPED WITH THE 4.1L ENGINE (CODE 4) COULD BE THE SERVO INTERNAL SPRING TENSION. CHECK THE SERVO. IF IT IS BLACK, IT SHOULD BE CHANGED TO ONE THE FOLLOWING: PART NUMBER: 25031845 FOR 'B' AND 'C' CAR PART NUMBER: 25031846 FOR 'E' CAR. THE NEW SERVO IS GRAY IN COLOUR.

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.