Orifice tube location on a 1998 gmc jimmy - 1998 GMC Jimmy

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It should be in the low pressure line that attaches to the accumulator.

On this website you find fuse box diagram, description, and location for GMC Jimmy (1998)

GMC Jimmy 1998 fuse box diagram Auto Genius

GMC Jimmy 1998 fuse box diagram CARKNOWLEDGE

In front of your radiator is the condensor. On the passenger side of the condensor are two lines. One runs parallel with the condensor fins (upper), and the other runs at an angle (lower). The lower line in the condensor is where your orifice is located. Properly evacuate the system and remove the fitting on the lower line. the orifice is located in the the tube that is at an angle on the condensor Look inside the tube and you will see the top of the orifice. looks like a crosshair. Carefully remove it with good needle nose pliers. DO NOT TWIST WHILE TRYING TO REMOVE IT. Just pull it out of the tube. It may be a little stubborn. Once removed, install the new orifice and replace the o ring on the line fitting. Have the system checked for leaks and recharge with freon.

The orifice tube is part of the Air conditioning system and it's located inside the A/C line that comes out of the evaporator, ( the part that's in the heater box). You will need to remove all the refrigerant to access it. And once you have serviced/replaced it, you have to evacuate the system ( pull a vacum) for 45 minutes to remove any moisture and then recharge the system. Also replacement of the drier/reciever is recommended.

The expansion (orifice) tube is located in the evaporator inlet pipe....

HI, this system only uses the one orifice tube. What made you think the orifce tube was causing your system not to blow cold air?

High Pressure outlet hose.

Hello TJ.
If yours is the S15 Jimmy it is mounted inside the inlet tube to the evaporator.
Number 142 in the diagram below.

If it is the full size Jimmy the orifice tube is located in the evaporator inlet pipe (high side line) at the liquid line connection.
You will need to undo #41 nut to get to it.
Here is a diagram.


This should cover your question.

KL

it is located in the high pressure AC line at the AC evaporator core inlet. The high pressure line is the smaller of the two AC lines that come from the AC compressor on the engine..