For 1990-2009 cars

# NEW A/C HIGH SIDE PRESSURE SERVICE PORT ASSEMBLY

#### SUBJECT: NEW A/C HIGH SIDE PRESSURE SERVICE PORT ASSEMBLY

#### MODELS/YEARS: 1991-92 CUTLASS CIERA AND CUTLASS SUPREME

This Bulletin Cancels And Replaces Dealer Technical Bulletin 91-T-17, Which Should Be Discarded.

All 1991-92 Cutlass Ciera and Cutlass Supreme models are equipped with a new A/C high pressure service port assembly. The A/C low side pressure service port will remain the same.

The new A/C high pressure port (Figure 1) is not designed with a depressor pin, compared to the older port (Figure 2) which has a depressor pin. The new A/C high pressure port will require the use of two special tools for servicing.

Tool J 38702 (Figure 3), is a straight adapter which allows existing diagnostic equipment to be connected to the service port, and high side pressures to be checked by opening the port. The adapter connects, first to the gage hose and then to the high side pressure port, by threading the adapter to the port.

#### CAUTION:

Never remove the gage line from its adapter when the line is connected to the A/C system. Always remove the line adapter from the service port to disconnect a line. Do not remove the charging hose at the gage set while attached to the service high side port. This will result in complete discharging of the system due to the depressed valve and may cause personal injury due to escaping refrigerant.

#### Important: Tool J-38702 Adapter MUST BE ASSEMBLED to the fitting FINGER TIGHT. Using a tool to tighten this adapter may exceed the assembly torque of the 2 piece High Side Service Port Assembly. If this occurs, the attempted removal of the adapter may result in the service port fitting being removed with it, causing loss of refrigerant.

Tool J 38704 (Figure 4), is an octagon socket which is used to unthread the A/C high side pressure port from the high side A/C line and then used to thread the new port back onto the high side pressure line.

The following service parts are currently available from GMSPO.

Part Part Number ---- ----------- Valve Core Housing and O-ring 52456273 O-ring 52450548

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.