A/C HEATER DEFROSTER OPERATION AIR FLOW SWITCHING

MODELS AFFECTED: 1984 Rivera Equipped With C60 AND 5.0L V8 Engines

NOTICE: This bulletin is reissued to correct bulletin number. Please discard bulletin 84-10-2.

Air flaw switching from A/C to heater or defroster outlets during heavy acceleration can be caused by the HVAC vacuum hoses being installed incorrectly. The illustratian shows the correct hose installation.

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.