1986-87 FIREBIRD MODELS
Page 8A-134-0 of the 1986 and 1987 Firebird Service Manual is incorrect. There is no ground supplied through the ignition switch. The park brake provides the ground for the circuit and must be applied before the hatch release can operate.
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.