DELAYED AND HARSH UPSHIFTS REVISED THROTTLE BODY ASSY.

1987 6000 MODELS WITH 2.8L MPFI V6 ENGINES (LB6) AND AUTOMATIC TRANSAXLES

"Please discard bulletin 87-7-8, dated 1/87 due to updated information included in this revision."

Some early built 1987 6000 models with 2.8L V6 engines (VIN Code W) and THM 125C (MD9) or 440-T4 (ME9) automatic transaxles may exhibit delayed and or harsh upshifts, and in some cases a reduction in detent downshift availability.

After the condition has been verified, inspect the throttle valve (Tv) cable for proper operation and adjustment. (Follow the T.V. cable adjustment procedures contained in the appropriate Service Manual.) If the T.V. system is operating properly and the condition still exists, it may be caused by insufficient travel of the throttle lever on the throttle body assembly.

This condition can be repaired by installing a new throttlebody ass(Bmbly with a revised throttle lever. Throttle body service kits are as follows:

All 6000 Models except 17111886 Pontiac STE Model

Pontiac STE Model 17111884

NOTE: THE SERVICE THROTTLE BODY KIT INCLUDES ONLY THE CORE THROTTLE BODY. IT DOES NOT INCLUDE THE FOLLOWING PARTS, WHICH ARE AVAILABLE SEPARATELY:

- COOLANT COVER, O-RING AND ATTACHING SCREWS - IDLE AIR CONTROL VALVE, HOUSING AND ATTACHING SCREWS - THROTTLE POSITION SENSOR AND ATTACHING SCREWS

THESE ITEMS CAN BE TRANSFERRED FROM THE ORIGINAL THROTTLE BODY ASSEMBLY.

Use applicable Labor Time and Operation Number.

SERVICE DEPARTMENT PONTIAC DIVISION GENERAL MOTORS CORPORATION

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.