BANGING NOISE FROM UNDER HOOD ON HARD ACCEL.-REPLACE INTAKE

Subject: BANGING NOISE FROM UNDER HOOD AREA DURING AGGRESSIVE LAUNCH MANEUVERS (NEW INTAKE MANIFOLD)

Models Affected: 1992 SUNBIRD MODELS WITH 2.0L M/T

Condition:

---------- Some owners of 1992 Pontiac Sunbird models with VIN breakpoint numbers prior to N7518551 may comment of a banging noise from the under hood area during aggressive launch maneuvers with a manual transmission.

Cause:

------ The intake manifold may contact the brake booster when the engine rocks during acceleration.

Correction: Install new intake manifold assembly, P/N 93212246. -----------

Part is expected to be available on March 9, 1992. In case of limited inventory, parts will be placed on 400 Control to waive VIP surcharges. only verifiable emergency VIP orders will be accepted. SPO will make every effort to obtain parts. However, the part will be shipped premium transportation at dealer's expense and all other order types will be placed on backorder until the 400 control is removed.

Labor Operation Number: J0200

Labor Time: 2.5 Hours

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.