For 1990-2009 cars

# NO 4TH GEAR/BURNED BAND 700-R4 PAN GASKET/RTV BLOCK OIL HOLE

IF A CONDITION OF NO 4TH GEAR AND/OR A BURNED 2-4 BAND ASSEMBLY IS ENCOUNTERED ON ANY THM 700-R4 TRANSMISSION, THE CAUSE MAY BE A BLOCKED 2-4 SERVO EXHAUST HOLE. SEE FIGURE 1. THE USE OF R.T.V. SILICONE SEALANT AND/OR SOME AFTERMARKET OIL PAN GASKETS MAY BLOCK THIS 2-4 SERVO EXHAUST HOLE CAUSING THE ABOVE CONDITIONS. WHEN INSTALLING THE OIL PAN ON ANY THM 700-R4 TRANSMISSION BE CERTAIN TO USE ORIGINAL EQUIPMENT OIL PAN GASKETS SO THE 2-4 SERVO EXHAUST HOLE IS NOT BLOCKED. ALSO, DO NOT USE R.T.V. SILICONE SEALANT ON ANY THM 700-R4 OIL PAN.

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.